NCERT Mathematics Class 9 Exemplar Ch 14 Statistics and Probability Part 13

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Exercise 14.4

Q.1. The following are the marks (out of 100) of 60 students in mathematics.

Construct a grouped frequency distribution table with width of each class starting from .

Answer:

Construct a Grouped Frequency Distribution Table with Width 10 of Each Class Starting from 0 - 9
Construct a grouped frequency distribution table with width 10 of each class starting from 0 - 9

Class

Frequency

1

2

5

6

3

4

3

2

5

4

Q.2. Refer to Q1 above. Construct a grouped frequency distribution table with width 10 of each class, in such a way that one of the classes is 10 - 20 (20 not included).

Answer:

Construct a Grouped Frequency Distribution Table with Width 10 of Each Class
Construct a grouped frequency distribution table with width 10 of each class

Class intervals

Frequency

4

7

5

10

5

8

5

8

5

3

Q.3. Draw a histogram of the following distribution:

Draw a Histogram of the Following Distribution
Draw a histogram of the following distribution

Heights (in cm)

Number of students

7

8

14

10

6

5

Q.4. Draw a histogram to represent the following grouped frequency distribution:

Draw a Histogram to Represent the Following Grouped Frequency Distribution
Draw a histogram to represent the following grouped frequency distribution

Ages (in years)

Number of teachers

10

28

32

48

50

35

12

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