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Data Analysis Using Graphs

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Develop the skills required to use and graph relevant data from a spreadsheet.

Have students name common graphs that they might see daily. What do they mean? What do they measure? What do they represent overall? Discuss the context that each type of graph could be used in.

Read about real-world situations where a business might graph data in order to understand the success of a project.

**Resources:

**Student Handout
DEFINITION OF A GRAPH
When you think of illustrations, you think of a cartoon or a comic book, but a graph is an illustration too. Except, instead of illustrating a creative concept or personal opinion graphs illustrate facts and figures – otherwise known as data.
Graphs come in many shapes and sizes, but at the end of the day they are simply visual tools for expressing measurable data.

TYPES OF GRAPH
• Pictograph
Pictographs are simply graphs which display data using picture symbols, making them popular for communicating the ‘big picture’ to a large audience very quickly. However, they are not a good tool to use for displaying detailed analysis, which is why they are rarely used in anything but presentations to the public or an audience who have to understand the topic quickly. For example, you will rarely find a pictograph in an academic report. The pictograph below is in the context of a monthly sales chart at a car yard.

• Line Graph
Line graphs are perhaps the most common form of graph, used by everyone from scientists to salespeople to depict the improvement or decline in a field of data.

• Column/Bar Graph
A close relation to the line graph, the ease of communication of a bar graph makes it ideal for presenting comparative data over a period of time. Vertical bar graphs – as opposed to the horizontal graph below - are often referred to as Column graphs.

• Pie Graph
Pie graph are simply a visual representation of percentages, so if the car yard were to look at the total sales for the month of August and break the sales team’s success down into individual percentages, it would look like this:

USE OF GRAPHS
There is a time and a place for graphs, but it depends on the audience. Graphs are great for the quick communication of facts, which is why they are often used in business plans or presentations to investors who may see many such plans or presentations in a day or a week. Graphs make the communication of data easier, quicker and in many cases more memorable. However, the over-use of graphs compared to text in a presentation can often simply look lazy, as if in-depth analysis h

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Data Analysis Using Graphs

1. 1. Graphing Data
2. 2. What is a graph? A Graph… … is a visual display of data which can communicate facts and figures quickly www.business.govt.nz
3. 3. Graphs are used……To compare pieces of data –such as sales figures for acertain time period comparedto another www.business.govt.nz
4. 4. Pictographs…… Use pictures to representdata… They are often used inthe media because they areeasy to understandwww.business.govt.nz
5. 5. Line Graphs……Depict improvementsand declines…They are very commonbecause they providemore detail than apictographwww.business.govt.nz
6. 6. Bar Graphs…… Are ideal for presentingcomparisonswww.business.govt.nz
7. 7. Pie Graphs…… Are a visualisation ofpercentageswww.business.govt.nz
8. 8. Making a graph from ExcelMicrosoft Excel is aspreadsheet program whichallows people to quicklycalculate datawww.business.govt.nz
9. 9. Graphing: Step 1.Enter columns of data into Sales: AugustExcel Jack 5 Jill 25Use this example of sales Bob 14 Sue 44data from a car yard taken Dan 11from the topic hand out: Jane 7www.business.govt.nz
10. 10. Graphing Data: Step 2.Highlight the data once it hasbeen in-putted into thespreadsheetSelect ‘Insert’ from thedropdown titles at the topand select a chart from thechoiceswww.business.govt.nz