The document discusses frequency distribution, which organizes collected data into a table showing the frequency of items or values. It provides an example of students' quiz scores organized into a frequency distribution table showing the number of students who scored each mark. The document also discusses various graphical representations of frequency distributions, including bar graphs, histograms, pie charts, and frequency polygons, which provide visual displays of the frequency of data values.

1. Frequency distribution
2/24/2022 1
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

2. 2/24/2022 2
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

3. Introduction
A frequency distribution shows the frequency of repeated items in a graphical
form or tabular form. It gives a visual display of the frequency of items or
shows the number of times they occurred. Let's learn about frequency
distribution in this article in detail.
2/24/2022 3
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

4. What is Frequency Distribution?
1. Frequency distribution is used to organize the collected data in table form.
2. The data could be marks scored by students, temperatures of different towns,
points scored in a volleyball match, etc.
3. After data collection, we have to show data in a meaningful manner for
better understanding.
2/24/2022 4
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

5. What is Frequency Distribution?
4. Organize the data in such a way that all its features are summarized in a
table.
5. This is known as frequency distribution.
EXAMPLE
Let's consider an example to understand this better. The following are the
scores of 10 students in the G.K. quiz released by Mr. Chris----
2/24/2022 5
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

6. 15, 17, 20, 15, 20, 17, 17, 14, 14, 20. Let's represent this data in
frequency distribution and find out the number of students who got
the same marks.
2/24/2022 6
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

7. 2/24/2022 7
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

8. a. We can see that all the collected data is organized under the
column quiz marks and the number of students.
b. This makes it easier to understand the given information and we
can see that the number of students who obtained the same
marks.
2/24/2022 8
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

9. c. Thus, frequency distribution in statistics helps us to organize the
data in an easy way to understand its features at a glance.
2/24/2022 9
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

10. Frequency Distribution Graphs
1. There is another way to show data that is in the form of graphs and it can be
done by using a frequency distribution graph.
2. The graphs help us to understand the collected data in an easy way.
3. The graphical representation of a frequency distribution can be shown using
the following:
2/24/2022 10
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

11. a. Bar Graphs
Bar graphs represent data using rectangular bars of uniform width along
with equal spacing between the rectangular bars.
2/24/2022 11
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

12. 2/24/2022 12
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

13. b. Histograms
A histogram is a graphical presentation of data using rectangular bars of
different heights. In a histogram, there is no space between the rectangular bars.
2/24/2022 13
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

14. 2/24/2022 14
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

15. Pie Chart
A pie chart is a type of graph that visually displays data in a circular chart. It
records data in a circular manner and then it is further divided into sectors that
show a particular part of data out of the whole part.
2/24/2022 15
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

16. c. Pie Chart
A pie chart is a type of graph that visually displays data in a circular chart. It
records data in a circular manner and then it is further divided into sectors that
show a particular part of data out of the whole part.
2/24/2022 16
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

17. 2/24/2022 17
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

18. d. Frequency Polygon
A frequency polygon is drawn by joining the mid-points of the bars in a
histogram.
2/24/2022 18
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

19. 2/24/2022 19
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.

20. 2/24/2022 20
Dr. Ashish Suttee, M.Pharm., MBAHCS., PGD Stat., Ph.D.