This document provides an overview of best practices for visualizing data for different audiences. It discusses choosing the most appropriate visualization based on the key message, such as comparing numbers, showing how numbers relate to a total, or how numbers change over time. Specific graph types are recommended, such as bar charts for comparisons, pie or stacked bar charts to show parts of a whole, and line graphs to illustrate changes. The document also covers principles like emphasizing important numbers, showing uncertainty, and formatting graphs clearly. Overall, it aims to teach how to effectively communicate data visually for non-technical audiences.
AMES 2016 - The Human Side of AnalyticsStephen Tracy
The document provides 10 tips for analytics success. It discusses the importance of asking good questions to gain insights, thinking long-term about building an analytics program, starting with investing in people over technology, seeking truth over validating preconceptions from data, understanding data limitations, ensuring ownership of the analytics function, investing in storytellers to communicate insights, finding meaningful ways to visualize data, and transforming data into actionable insights.
This document provides an overview of data visualization techniques that can help non-technical audiences understand and make sense of data. It discusses the importance of selecting the right chart type for the data, such as using histograms to show variation, line graphs for trends over time, and Pareto charts to identify the vital few causes of issues. The document also covers techniques for smoothing time series data, such as moving averages, to identify underlying trends. The goal is to help organizations at all levels make better decisions and improve performance through effective data communication and interpretation.
This is a presentation I gave on Data Visualization at a General Assembly event in Singapore, on January 22, 2016. The presso provides a brief history of dataviz as well as examples of common chart and visualization formatting mistakes that you should never make.
This document provides an overview and agenda for a one-day data analysis training. The training will cover foundational concepts of data analysis including data preparation, visualization, and effective data presentation. It will include exercises in data gathering, graph types, pivot tables, and developing data stories. The goal is to help participants turn data into meaningful insights through analysis and visualization.
This document provides best practices and guidelines for data visualization. It recommends using simple and clear visualizations like bar charts instead of more complex charts like pie charts or maps when not needed. Key tips include avoiding color schemes that are hard to distinguish, including data sources and levels of confidence, and having visualizations reviewed by experts to improve quality and transparency. The goal is to present data in a way that is easy to understand, accurately represents patterns and relationships, and builds trust with audiences.
The presentation gives an introduction to statistics and tries to show the importance of statistics for planners. It talks about the various ways in which the data is categorized and also explains on how to select the chart type to be used depending on what kind of information you want to present.
AMES 2016 - The Human Side of AnalyticsStephen Tracy
The document provides 10 tips for analytics success. It discusses the importance of asking good questions to gain insights, thinking long-term about building an analytics program, starting with investing in people over technology, seeking truth over validating preconceptions from data, understanding data limitations, ensuring ownership of the analytics function, investing in storytellers to communicate insights, finding meaningful ways to visualize data, and transforming data into actionable insights.
This document provides an overview of data visualization techniques that can help non-technical audiences understand and make sense of data. It discusses the importance of selecting the right chart type for the data, such as using histograms to show variation, line graphs for trends over time, and Pareto charts to identify the vital few causes of issues. The document also covers techniques for smoothing time series data, such as moving averages, to identify underlying trends. The goal is to help organizations at all levels make better decisions and improve performance through effective data communication and interpretation.
This is a presentation I gave on Data Visualization at a General Assembly event in Singapore, on January 22, 2016. The presso provides a brief history of dataviz as well as examples of common chart and visualization formatting mistakes that you should never make.
This document provides an overview and agenda for a one-day data analysis training. The training will cover foundational concepts of data analysis including data preparation, visualization, and effective data presentation. It will include exercises in data gathering, graph types, pivot tables, and developing data stories. The goal is to help participants turn data into meaningful insights through analysis and visualization.
This document provides best practices and guidelines for data visualization. It recommends using simple and clear visualizations like bar charts instead of more complex charts like pie charts or maps when not needed. Key tips include avoiding color schemes that are hard to distinguish, including data sources and levels of confidence, and having visualizations reviewed by experts to improve quality and transparency. The goal is to present data in a way that is easy to understand, accurately represents patterns and relationships, and builds trust with audiences.
The presentation gives an introduction to statistics and tries to show the importance of statistics for planners. It talks about the various ways in which the data is categorized and also explains on how to select the chart type to be used depending on what kind of information you want to present.
This document provides an overview of data visualization. It discusses the importance of data visualization and provides guidance on summarizing data using tables and charts/graphs. Key types of charts are described, including bar charts, line graphs, pie charts, histograms, and more. It also covers interpreting data and potential distortions that can occur in graphs. The document emphasizes labeling components, choosing the right graph for the data, and using visualization to detect patterns and make comparisons.
This document provides an overview of statistical tools used in research. It begins with an introduction to statistics and discusses descriptive and inferential statistics. Descriptive statistics summarize data through measures like the mean, median and mode, while inferential statistics make inferences about a population based on a sample. Both parametric and non-parametric statistical tests are covered. Common parametric tests include the t-test and ANOVA, which assume a normal distribution, while non-parametric tests like the chi-squared test are used when distributions are unknown. The document also reviews variables, types of data, statistical software options and includes examples and quizzes.
This document provides guidance on making sense of data and effectively communicating insights through visualizations. It discusses challenges organizations face in analyzing large amounts of data and offers tips for selecting appropriate chart types to analyze and present different types of data. Examples include using histograms to show variation, Pareto charts for identifying priorities, and line and moving average charts for trends over time. The goal is to help organizations and individuals at all levels better understand and make decisions based on data.
This document provides an introduction to descriptive statistics and how numbers can be used to describe data patterns but also be misused or misrepresented. It discusses how descriptive statistics are used to describe data distributions, find trends, determine if samples represent populations, and draw conclusions. However, it cautions that averages, variability, sample size, potential outliers, and confidence intervals must be considered to properly understand data. Graphs can also distort data if scales are manipulated or too much "chartjunk" is used. Skepticism is advised toward conclusions from data that lack appropriate context and statistical significance.
The document discusses graphical representation of data using statistical tools. It describes different types of graphs like bar charts, pie charts, scatter plots, and line charts. It explains how to select the appropriate graph based on the type of data and analyze the data. It also discusses limitations of graphs and statistical analysis methods like calculating mean and standard deviation to analyze data in a robust way.
These free internet facility were placed in Barangay Camp 7 Minglanilla, Cebu to enable government workers, teachers, students, and the rest of the population to harness the advantages brought about by digitalization. To students who are travelling on a tight budget can benefit tremendously from it. After all, the internet connection has become more or less a part of the basic amenities, especially to that of a student. A free WiFI service can naturally benefit us asa a student more than anything.
We are one step closer to strengthening internet connectivity and access. During these challenging times where access to the internet has become one of the most valuable resources. Filipinos in every part of the country will be given the chance to participate and thrive in the ever-advancing digital world.
Lesson 26 presenting and interpreting data in tabular and graphical fromsmjlobetos
This document discusses different methods for presenting data visually, including tabular, textual, and graphical forms. Tabular presentation organizes data in a table with clear headings and structure. Textual presentation describes data using words and numbers. Common graphical methods are line graphs to show trends over time, bar graphs to compare categories, and pie charts to illustrate proportions of a whole. Together, these visualization techniques help communicate findings from research studies.
Data Collection, analysis and Visualization.pptxadesinaadedotun3
The document discusses data visualization and its importance in communicating findings from statistical analyses. It notes that data visualization makes data easily understood, encourages interaction, and speeds up decision making. Examples of applications include tracking project progress, stakeholder engagement, mapping, research dissemination, and predictive analysis. The document then covers various types of data visualization techniques including tables, bar charts, pie charts, histograms, scatter plots, and others. It provides examples and guidelines for constructing different types of charts and tables to effectively visualize data.
Presentation of Data - How to Construct Graphssheisirenebkm
This document provides information and instructions on constructing different types of graphs: bar graphs, line graphs, and circle/pie graphs. It includes examples of each graph type using sample data. Steps are outlined for properly constructing each graph, including labeling axes, determining scale intervals, plotting points, and connecting data. The document emphasizes choosing the right graph based on whether the data involves categories, parts of a whole, or trends over time. Conceptual check questions test understanding of which graph type is best suited for different data sets.
With the Census in England and Wales taking place on 21 March 2021, we created a programme of webinars to showcase our plans for design and quality assurance. The series, which was carried out through November and December 2020, included a high-level introductory overview as well as 'In Focus' sessions that outlined specific aspects in more detail. These webinars gave attendees the opportunity to ask questions and provide feedback.
This document is a lab file submitted by Sukhchain Aggarwal, a student of B.com, to their professor Harjeet Kaur. It contains an acknowledgement thanking the professors for their guidance. The document then outlines how to create different types of charts in Microsoft Excel, including line charts, bar charts, and pie charts. It provides examples of each chart type using sample data on test scores and the numbers of students in different years. Tables are included showing average, maximum, and minimum values calculated from the data using Excel formulas. Sources consulted for the file are listed in a bibliography.
BUSINESS INTELLIGENCE AND DATA ANALYTICS presentationMohit Negi
SIX SIGMA APPROACH, DIFFERENT TYPES OF CHARTS AND THEIR FUNCTION, DASHBOARD, BUSINESS INTELLIGENCE, DATA VISUALISATION INFORMATION VISUALISATION, PERFORMANCE DASHBOARD, BUSINESS REPORTING, BALANCE SCORECARD
Applied SPSS for Data Forecasting of Sale Quantityijtsrd
SPSS is powerful to analyze business and marketing data. This paper intends to support business and marketing leaders the benefits of data forecasting with applied SPSS. It showed the sale quantity forecasting based on unit price and advertising. As SPSS's background algorithms, it showed the regression algorithm for data forecasting and ANOVA algorithm for data significant. It includes one sample data was downloaded from Google and was analyzed and viewed. It used IBM SPSS statistics version 23 and PYTHON version 3.7. Aung Cho | Aung Si Thu "Applied SPSS for Data Forecasting of Sale Quantity" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26378.pdfPaper URL: https://www.ijtsrd.com/computer-science/data-miining/26378/applied-spss-for-data-forecasting-of-sale-quantity/aung-cho
Chart Makeover: A Women's Nutrition Bar ChartAmanda Makulec
One of the most common requests I receive is to review charts and graphs and provide insight around how to improve them by using the formatting tools available in Excel.
This example shows the process of redesigning the chart to better facilitate comparison within regions of the trend towards a greater percent of women falling into the overweight and obese categories (from 1980 to 2008).
Data is only useful when your audience can understand it. One of the best ways to decipher a jumble of figures and statistics is to turn it into a visual representation. Learn how to become a data visualization pro.
Lect_2_ Data visualization using Microsoft Excel[64].pptxdreyterewe
This document provides an overview of common types of data visualization that can be created using Microsoft Excel. It discusses charts (bar, line, pie, scatter), tables, graphs, maps, infographics, and dashboards. For charts, it gives examples of bar charts, line charts, pie charts, and scatter charts. It also covers topics like tables, skewed distributions, correlations, regressions, time series plots, histograms, box plots, measures of central tendency, and standard deviation. Examples of data visualization using infographics and maps are also provided.
Different Types of Graphs Mathematics Presentation.pdfyongyi18
Graphs are visual representations of data that are used to communicate, analyze, and interpret information. Different types of graphs serve different purposes, with line graphs used to show trends over time, bar graphs to compare categories across groups, pie charts to show relative proportions, histograms to visualize frequency distributions, scatter plots to show relationships between variables, box plots to summarize data distributions, and pictographs to present simple data visually.
North Raleigh Rotarian Katie Turnbull gave a great presentation at our Friday morning extension meeting about data visualization. Katie is a consultant at research and advisory firm, Gartner, Inc.
Data Visualisation Design Workshop #UXbneCam Taylor
In this workshop we’ll explore both the art and science of communicating information graphically in the digital world.
With lots of great examples and a hands-on team exercise, the session is intended to make us think about how we can convey information more clearly and efficiently in our apps, presentations, reports, emails and other forms of communication.
This presentation captures how nutrition has changed in Burkina over time, by not only assessing nutrition relevant data,
programs and policies, but also on capturing experiential learning from those doing nutrition relevant
work in the region
•
Understand How Burkina Faso has created an enabling environment allowing for positive and sustained
change
•
Identify how multi sectoral nutrition relevant policies and programs are designed and implemented in
different contexts, what has worked well, what has not, why, and how Burkina Faso can share experiences
and approaches
•
Frame a constructive discussion in mobilizing future actions and commitments
• Use stories and storytelling to cut through complexity and engage audiences
Prepared by:
Richmond Aryeetey (University of Ghana), Afua Atuobi-Yeboah (University of Ghana), Mara van den Bold (International Food Policy Research Institute), Nick Nisbett (Institute of Development Studies)
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This document provides an overview of data visualization. It discusses the importance of data visualization and provides guidance on summarizing data using tables and charts/graphs. Key types of charts are described, including bar charts, line graphs, pie charts, histograms, and more. It also covers interpreting data and potential distortions that can occur in graphs. The document emphasizes labeling components, choosing the right graph for the data, and using visualization to detect patterns and make comparisons.
This document provides an overview of statistical tools used in research. It begins with an introduction to statistics and discusses descriptive and inferential statistics. Descriptive statistics summarize data through measures like the mean, median and mode, while inferential statistics make inferences about a population based on a sample. Both parametric and non-parametric statistical tests are covered. Common parametric tests include the t-test and ANOVA, which assume a normal distribution, while non-parametric tests like the chi-squared test are used when distributions are unknown. The document also reviews variables, types of data, statistical software options and includes examples and quizzes.
This document provides guidance on making sense of data and effectively communicating insights through visualizations. It discusses challenges organizations face in analyzing large amounts of data and offers tips for selecting appropriate chart types to analyze and present different types of data. Examples include using histograms to show variation, Pareto charts for identifying priorities, and line and moving average charts for trends over time. The goal is to help organizations and individuals at all levels better understand and make decisions based on data.
This document provides an introduction to descriptive statistics and how numbers can be used to describe data patterns but also be misused or misrepresented. It discusses how descriptive statistics are used to describe data distributions, find trends, determine if samples represent populations, and draw conclusions. However, it cautions that averages, variability, sample size, potential outliers, and confidence intervals must be considered to properly understand data. Graphs can also distort data if scales are manipulated or too much "chartjunk" is used. Skepticism is advised toward conclusions from data that lack appropriate context and statistical significance.
The document discusses graphical representation of data using statistical tools. It describes different types of graphs like bar charts, pie charts, scatter plots, and line charts. It explains how to select the appropriate graph based on the type of data and analyze the data. It also discusses limitations of graphs and statistical analysis methods like calculating mean and standard deviation to analyze data in a robust way.
These free internet facility were placed in Barangay Camp 7 Minglanilla, Cebu to enable government workers, teachers, students, and the rest of the population to harness the advantages brought about by digitalization. To students who are travelling on a tight budget can benefit tremendously from it. After all, the internet connection has become more or less a part of the basic amenities, especially to that of a student. A free WiFI service can naturally benefit us asa a student more than anything.
We are one step closer to strengthening internet connectivity and access. During these challenging times where access to the internet has become one of the most valuable resources. Filipinos in every part of the country will be given the chance to participate and thrive in the ever-advancing digital world.
Lesson 26 presenting and interpreting data in tabular and graphical fromsmjlobetos
This document discusses different methods for presenting data visually, including tabular, textual, and graphical forms. Tabular presentation organizes data in a table with clear headings and structure. Textual presentation describes data using words and numbers. Common graphical methods are line graphs to show trends over time, bar graphs to compare categories, and pie charts to illustrate proportions of a whole. Together, these visualization techniques help communicate findings from research studies.
Data Collection, analysis and Visualization.pptxadesinaadedotun3
The document discusses data visualization and its importance in communicating findings from statistical analyses. It notes that data visualization makes data easily understood, encourages interaction, and speeds up decision making. Examples of applications include tracking project progress, stakeholder engagement, mapping, research dissemination, and predictive analysis. The document then covers various types of data visualization techniques including tables, bar charts, pie charts, histograms, scatter plots, and others. It provides examples and guidelines for constructing different types of charts and tables to effectively visualize data.
Presentation of Data - How to Construct Graphssheisirenebkm
This document provides information and instructions on constructing different types of graphs: bar graphs, line graphs, and circle/pie graphs. It includes examples of each graph type using sample data. Steps are outlined for properly constructing each graph, including labeling axes, determining scale intervals, plotting points, and connecting data. The document emphasizes choosing the right graph based on whether the data involves categories, parts of a whole, or trends over time. Conceptual check questions test understanding of which graph type is best suited for different data sets.
With the Census in England and Wales taking place on 21 March 2021, we created a programme of webinars to showcase our plans for design and quality assurance. The series, which was carried out through November and December 2020, included a high-level introductory overview as well as 'In Focus' sessions that outlined specific aspects in more detail. These webinars gave attendees the opportunity to ask questions and provide feedback.
This document is a lab file submitted by Sukhchain Aggarwal, a student of B.com, to their professor Harjeet Kaur. It contains an acknowledgement thanking the professors for their guidance. The document then outlines how to create different types of charts in Microsoft Excel, including line charts, bar charts, and pie charts. It provides examples of each chart type using sample data on test scores and the numbers of students in different years. Tables are included showing average, maximum, and minimum values calculated from the data using Excel formulas. Sources consulted for the file are listed in a bibliography.
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SIX SIGMA APPROACH, DIFFERENT TYPES OF CHARTS AND THEIR FUNCTION, DASHBOARD, BUSINESS INTELLIGENCE, DATA VISUALISATION INFORMATION VISUALISATION, PERFORMANCE DASHBOARD, BUSINESS REPORTING, BALANCE SCORECARD
Applied SPSS for Data Forecasting of Sale Quantityijtsrd
SPSS is powerful to analyze business and marketing data. This paper intends to support business and marketing leaders the benefits of data forecasting with applied SPSS. It showed the sale quantity forecasting based on unit price and advertising. As SPSS's background algorithms, it showed the regression algorithm for data forecasting and ANOVA algorithm for data significant. It includes one sample data was downloaded from Google and was analyzed and viewed. It used IBM SPSS statistics version 23 and PYTHON version 3.7. Aung Cho | Aung Si Thu "Applied SPSS for Data Forecasting of Sale Quantity" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26378.pdfPaper URL: https://www.ijtsrd.com/computer-science/data-miining/26378/applied-spss-for-data-forecasting-of-sale-quantity/aung-cho
Chart Makeover: A Women's Nutrition Bar ChartAmanda Makulec
One of the most common requests I receive is to review charts and graphs and provide insight around how to improve them by using the formatting tools available in Excel.
This example shows the process of redesigning the chart to better facilitate comparison within regions of the trend towards a greater percent of women falling into the overweight and obese categories (from 1980 to 2008).
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Graphs are visual representations of data that are used to communicate, analyze, and interpret information. Different types of graphs serve different purposes, with line graphs used to show trends over time, bar graphs to compare categories across groups, pie charts to show relative proportions, histograms to visualize frequency distributions, scatter plots to show relationships between variables, box plots to summarize data distributions, and pictographs to present simple data visually.
North Raleigh Rotarian Katie Turnbull gave a great presentation at our Friday morning extension meeting about data visualization. Katie is a consultant at research and advisory firm, Gartner, Inc.
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In this workshop we’ll explore both the art and science of communicating information graphically in the digital world.
With lots of great examples and a hands-on team exercise, the session is intended to make us think about how we can convey information more clearly and efficiently in our apps, presentations, reports, emails and other forms of communication.
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This presentation captures how nutrition has changed in Burkina over time, by not only assessing nutrition relevant data,
programs and policies, but also on capturing experiential learning from those doing nutrition relevant
work in the region
•
Understand How Burkina Faso has created an enabling environment allowing for positive and sustained
change
•
Identify how multi sectoral nutrition relevant policies and programs are designed and implemented in
different contexts, what has worked well, what has not, why, and how Burkina Faso can share experiences
and approaches
•
Frame a constructive discussion in mobilizing future actions and commitments
• Use stories and storytelling to cut through complexity and engage audiences
Prepared by:
Richmond Aryeetey (University of Ghana), Afua Atuobi-Yeboah (University of Ghana), Mara van den Bold (International Food Policy Research Institute), Nick Nisbett (Institute of Development Studies)
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Objective: to identify and catalogue peer-reviewed research on Adolesecent (10-19 years) nutrition in West Africa
----------
Objectif : Identifier et cataloguer la recherche revue par des pairs sur la nutrition des adolescents (10-19 ans) en Afrique de l'Ouest.
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3. Session goals
• Learn how to choose the most appropriate data
visualization based on your key message
• Identify what makes a good (and bad) data visualization
11 February 2020
4. What is the most
appropriate graph
based on key
message?
Exercise
26 February 2020
5. 26 February 2020
0% 20% 40% 60% 80% 100%
2015 DHS
2016 DHS
2017 DHS
Breastfeeding status children <6
months in Senegal1
2017 DHS2016 DHS2015 DHS
Breastfeeding status children <6
months in Senegal2
“The proportion of children <6 months
exclusively breastfed in Senegal
increased between 2015 and 2017.”
6. 26 February 2020
0
10
20
30
40
50
60
70
80
2018 DHS 2012/13 DHS 2006 DHS
Percent
Percentage of women age 15-
49 with any anaemia in Mali
by wealth quintile
1 2
“Prevalence of anaemia among women varies by
household wealth in Mali. The difference between
anaemia prevalence among the poorest and richest
increased between 2006 and 2013.”
7. “the graphic is only as
useful as the audience
finds it”
26 February 2020
8. How do we make good data
visualizations?
1. Identify your key message.
2. Choose an appropriate type of
visualization based on your key
message.
3. Create your data visualization
and double check that your
visual supports your key point.
26 February 2020
What is a key
message?
A key message is a
piece of information
that you want your
audience to
remember. It is the
“so what.”
9. Based on your key message, what
do you want your visualization to
show?
26 February 2020
Category Key Message
Comparisons • “This is how two or more numbers are
the same (or different)”
• “This is how one number/numbers
compare to the total”
• “This is how things change over time”
Small numbers,
percentages,
frequencies
• “This one number is VERY important
for you to remember”
Adapted from Evergreen, Stephanie DH. Effective Data Visualization: The Right Chart for the Right Data. SAGE Publications, 2016 and Chart Chooser.
10. How 2 or more
numbers are the same
(or different)
Comparisons
26 February 2020
11. Most effective ways to
compare 2 or more numbers
• For comparing 2 (or more) numbers…
• Side by side column graph (bar chart)
• Slope graph
• Dot plot
• Back-to-back bar chart
26 February 2020
12. Side by side column graph (bar
chart)
• Suitable for displaying categorical data and to
compare discrete data in distinct categories
• Each bar represents one category
• Can be organized horizontally or vertically
• Height of the bars are proportional to the
number of events (e.g. cases) in the category
• Variables in a bar graph can be discrete (e.g.
sex, region, race) or continuous (e.g. age) but
organized in categories (e.g. age groups)
26 February 2020
13. Side by side column graph (bar
chart)
• Side by side column graphs (bar charts) are the most
frequently used approach to compare two or more
numbers. However, they are often not the most
effective option.
26 February 2020
Studies suggest that side by side column graphs are
most effective for two categories. Why? Studies
have shown that our brains can process 3-5 groups
with 2 columns per group. Any more groups or
columns are challenging to interpret.
14. Slope graph
• Slope graphs are useful for comparing two categories
and emphasizing how some categories may have
changed faster than other categories.
26 February 2020
Our brains have a pretty easy time judging slope/rate
of change!
15. Bar chart to slope graph
transformation !
26 February 2020
0
5
10
15
20
25
30
35
Breastfed Nonbreastfed All children age
6-23 months
Percentofchildren6-23months
Minimum dietary diversity
among children 6-23 months in
Nigeria (2013 DHS v. 2018
DHS)
2013 DHS 2018 DHS
0
5
10
15
20
25
30
35
2013 DHS 2018 DHS
Percentofchildren6-23months
Minimum dietary diversity
among children 6-23 months in
Nigeria (2013 DHS v. 2018
DHS)
Breastfed
Nonbreastfed
All children age 6-23 months
16. Dot plot
• Dot plots can be
quickly read.
• Great option for
emphasizing gaps
between numbers
= “equiplots”
26 February 2020
Our brains can more accurately interpret dots on a
line, and space on a common axis rather than length
on varying axes (bar charts).
19. Back-to-back bar chart
• Back-to-back bar charts are two bar charts that are
aligned back-to-back
• Purpose is not to highlight specific values, but distributions
• One familiar example is the population pyramid
26 February 2020
Our brains can easily assess symmetry.
20. Back-to-back bar chart
example
26 February 2020
Number of case of stunting averted at national level and in Sikasso region
if the target of nutrition indicators in plans are met between 2015 and
2023, in Mali (NEP-Mali, 2019).
23. Two ways to compare parts of
a whole
• Pie chart
• Stacked bar chart
• 100% stacked bar chart
26 February 2020
Usually the
better option !
24. Pie charts
• Circular chart split into segments which show
components of a larger group
• Suitable for displaying categorical data, or discrete data
in distinct categories
• The size of a “slice” is proportional to the amount of
data (e.g., number of cases) it represents
• Proportion (%) of the total each component represents
is frequently added on the slice
• Different colors can be used to identify various slices
26 February 2020
25. When NOT to use a pie chart
• When you have more than 5 slices
• When the values of each slice are similar because it is
difficult to see differences between slice sizes
• For comparisons (one pie chart vs. another pie chart)
26 February 2020
Studies show that our brains have trouble quickly interpreting pie
charts compared to bar charts and line graphs, which are
composed of straight lines and 90 degree angles. Only choose a
pie chart when you are sure that the data cannot be effectively
visualized by a bar chart.
26. Stacked bar chart
26 February 2020
Number of case of
stunting averted
between 2015 and
2023 if the target set for
nutrition indicators in
ongoing plan are in Mali
(NEP-Mali Team, 2019)
27. 100% stacked bar chart
26 February 2020
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
2016 MIS
2014 DHS
2008 DHS
2003 DHS
Distribution of anaemia status among children age 6-59
months in Ghana
Mild anaemia Moderate anaemia Severe ananemia No anaemia
29. Most effective ways to show
change over time
• Line graph
• Slope graph
26 February 2020
Usually what you
should use !
0
5
10
15
20
25
30
35
2013 DHS 2018 DHS
Percent
Minimum dietary diversity among children 6-
23 months in Nigeria (2013 DHS v. 2018
DHS)
Breastfed
Nonbreastfed
All children age 6-23 months
0
10
20
30
40
50
60
70
80
90
100
2014 DHS 2015 DHS 2016 DHS 2017 DHS
Percent
Percentage of children age 6-59 months
who received vitamin A supplements in the
6 months before the survey in Senegal
30. When one number is
very important
Small numbers, percentages, frequencies
26 February 2020
31. Single numbers can have a big
impact
• Occasionally, you may want to tell a story that highlights
a single number for impact. Ways to visualize a single
number: use a big font, icons, and/or color.
26 February 2020
Nigeria DHS 2018 Infographic
Cameroon DHS 2011 Nutrition Fact Sheet
IFPRI & GNR 2015 Infographic
33. Communicating uncertainty
and statistical significance
• Consider your audience. Most
audiences don’t understand
confidence intervals or standard
deviation, and there is a risk that your
graph will confuse your audience.
• If you display variability or imply
statistical significance in your graph,
you must be able to explain it.
Examples:
• Confidence interval: “There’s a
statistically high chance that the actual
number falls within this range.”
• Statistical significance: “Statistically, the
trends shown did not happen by
chance.”
26 February 2020
Steve Gesuale presentation on visualizing uncertainty
Source: https://graphics.cs.wisc.edu/Papers/2014/CG14/Preprint.pdf
35. Showing targets
• You can easily show targets using “x” symbols or lines.
26 February 2020
0
10
20
30
40
50
60
2017 SMART
Percent
Exclusive breastfeeding among infants <6 months in Burkina
Faso (2017 SMART)
Global nutrition
target: at least 50%
36. Retain formatting dimensions
• Remember to press the “Shift” key on the keyboard
while resizing images to retain image proportions.
• If making your graphs in Excel, when pasting the graph
in PowerPoint or Word, select “paste as image”
• Right click graph to get this pop up:
26 February 2020
37. What is the most
appropriate graph based
on key message?
Revisiting exercise
26 February 2020
38. 26 February 2020
0% 20% 40% 60% 80% 100%
2015 DHS
2016 DHS
2017 DHS
Breastfeeding status children <6
months in Senegal1
2017 DHS2016 DHS2015 DHS
Breastfeeding status children <6
months in Senegal2
“The proportion of children <6 months
exclusively breastfed in Senegal
increased between 2015 and 2017.”
39. 26 February 2020
0
10
20
30
40
50
60
70
80
2018 DHS 2012/13 DHS 2006 DHS
Percent
Percentage of women age 15-
49 with any anaemia in Mali
by wealth quintile
1 2
“Prevalence of anaemia among women varies by
household wealth in Mali. The difference between
anaemia prevalence among the poorest and richest
increased between 2006 and 2013.”
40. Additional Resource: Data
Visualization Society (DVS)
26 February 2020
Join 10,000+
individuals interested
in data visualization
(all experience levels
welcomed)
41. Additional Reading
• Aung T, Niyeha D, Shagihilu S, Mpembeni R, Kaganda J, Sheffel A, Heidkamp R. Optimizing data
visualization for reproductive, maternal, newborn, child health, and nutrition (RMNCH&N) policymaking:
data visualization preferences and interpretation capacity among decision-makers in Tanzania. Global
health research and policy. 2019 Dec 1;4(1):4. [link]
• Aung T, Niyeha D, Heidkamp R. Leveraging data visualization to improve the use of data for global health
decision-making. Journal of Global Health. 2019 Dec;9(2). [link]
• Aung, T. Data Visualization for Audiences in Low & Middle-Income Countries. Data Visualization Society
Nightingale. 2019. [link]
• Evergreen, Stephanie DH. Effective Data Visualization: The Right Chart for the Right Data. SAGE
Publications, 2016.
• Global Health eLearning Center. Data Visualization - An Introduction [Internet]. 2015. Available from:
https://www.globalhealthlearning.org/course/data-visualization-brave-new-world
• Graybeal, Carolyn. “Exploring a Culture of Health: How Can We Visualize Health Data for Better
Communication?” PLOS CitizenSci Blog
• Pandey, Anshul Vikram, et al. "The persuasive power of data visualization." IEEE transactions on
visualization and computer graphics 20.12 (2014): 2211-2220.
26 February 2020
42. Thank you!
More information on
https://www.nationalevaluationplatform.org/
This training was developed with funding from
the Government of Canada & the Bill & Melinda
Gates Foundation
Editor's Notes
The goal of today’s session is to: (1) learn how to choose the most appropriate data visualization based on your key message and (2) identify what makes a good (and bad) data visualization.
First, we will do an exercise for you to think about your own preferences. We will then revisit these examples at the end of the presentation.
This exercise is similar to an exercise that the National Evaluation Platform project conducted with government decision-makers in Tanzania. The objective of that study was to characterize data visualization interpretation capacity and preferences among RMNCH&N Tanzanian program implementers and policymakers (“decision-makers”) to design more effective approaches towards promoting evidence-based RMNCH&N decisions in Tanzania.
Here is one key message and two different ways to visualize the data. <Read the key message>. Of the two graphs, which do you think better represents the key message? Raise your hand if you believe 1 is better. (Estimate number of hands). Raise your hand if you believe 2 is better. (Estimate number of hands).
Here is another key message and two different ways to visualize the data. <Read the key message>. Of the two graphs, which do you think better represents the key message? Raise your hand if you believe 1 is better. (Estimate number of hands). Raise your hand if you believe 2 is better. (Estimate number of hands).
Through the Data Visualization Society, a community of practice for those interested in data visualization, Tricia has led discussions on visualizing data for low- and middle-income audiences. One individual shared this comment, which is the key theme for today and should drive your data visualization choices.
What does this mean? Making a beautiful, fancy graph is fruitless if the audience can’t understand it.
How do we make sure we make a graph that an audience can understand? First, figure out what you are trying to get across – the key message. Key messages are short (1-2 sentences), relevant, easy to understand, and memorable. This presentation will focus on step 2 – choosing the right graph based on your key message. Step 3 accounts for the necessity to reflect on whether you’ve chosen the right graph, which can be done by yourself and/or with peers.
Here is a summary of key message categories which correspond to the handout (decision tree) that you can keep. This presentation is organized based on these common categories.
This presentation includes many examples using nutrition data from West Africa. Some graphs can be made in Excel, and other graphs are not Excel options but can be made using R or Tableau. Tricia can help those interested in making graphs in R or Tableau.
This is the most frequently used approach to visualizing comparisons, but is sometimes not the most effective (and you’ll learn other ways to visualize comparisons). The brain symbol will appear in this presentation when referencing data visualization studies.
This brain symbol will appear throughout the presentation. This symbol represents related research to this recommendation.
This is the same data visualized two different ways. In the slope graph, it is more apparently how minimum dietary diversity has dropped among non-breastfed children (negative slope).
Dot plots are often a great option because they are easy to read and emphasize a gap between numbers, which can be useful for equity graphs. University of Pelotas/Countdown to 2030 calls these “equiplots.”
What do you see? (Pause) The gap in coverage of iodized salt between rural/urban has decreased between 2005 and 2017!
Our brains are better at interpreting 90 degree angles and looking up-to-down and left-to-right. This is why stacked bar charts can be a better alternative than pie charts. Has anyone heard of a donut chart? (Pause and ask audience.) Donut charts are actually more challenging for our brains to interpret than even pie charts. This is because the center axis helps our brains figure out how big is the pie slice. Donut charts do not have a center axis, so can make interpretation more difficult.
What does this graph tell us? (Pause and let people look at it.) Proportion with no anaemia has increased over time while proportion of severe anaemia has decreased over time. How can we see this? (Point up-and-down to yellow (no anaemia) and up-and-down to dark blue (severe anaemia)).
The left is a line graph. The right is a slope graph.
Making a single number very large/in a different color, can be the most effective way to make your audience remember one important number. In one study, a team found that when individuals were shown disease prevalence in four different ways (single large number, icon array, pie chart, bar chart), a single large number was the most accurately interpreted in terms of disease significance and scope.
According to a study by Correll and Gleicher (2014), even individuals with a background in science have trouble interpreting graphs with confidence intervals, which is why they advised to only display them when necessary. Of the four options on the right, the one circled was most accurately interpreted.
What’s wrong with the graph on the left? (Pause and see if there are any reactions.) Double check that any continuous data (like time) is accurately reflected on an axis.
Let us revisit our exercise from the beginning.
Let’s see if you’ve decided to change your mind after today’s session. Of the two graphs, which do you think better represents the key message? Raise your hand if you believe 1 is better. (Count number of hands). Raise your hand if you believe 2 is better. (Count number of hands).
Of the two graphs, which do you think better represents the key message? Raise your hand if you believe 1 is better. (Count number of hands). Raise your hand if you believe 2 is better. (Count number of hands).
The purpose of DVS: 1) Foster collaboration and discussion on data visualization 2) Serve as a resource for data visualization practioners 3) Encourage growth of the field. Over 10,000 members and membership is currently free with growing resources to help those interested in expanding and sharing their data visualization knowledge.
DVS could particularly benefit from more members from West Africa based on this map!
Here are additional resources if you want to learn more about the National Evaluation Platform’s data visualization work and data visualization research.