NCERT Mathematics Class 9 Exemplar Ch 14 Statistics and Probability Part 13 (For CBSE, ICSE, IAS, NET, NRA 2022)

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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
Class
Frequency1256343254

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
Class intervalsFrequency
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
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
Ages (in years)Number of teachers
10
28
32
48
50
35
12