Question

EXERCISE 13(a)
1. A teacher gave a test of 50 marks to the students of her class. Following marks are obtained b
the student:
40, 32, 48, 47, 35, 33, 20, 22, 25, 38, 16, 13, 45, 47, 38, 30, 38, 37, 47, 49, 40, 49, 35, 15, 27
Prepare a frequency distribution table.
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Answer 1

Answer:

Construct a grouped frequency distribution table with class size 5 for the data given above taking the first interval as 0-5 (5 not included). What main features do you observe from this tabular representation?

Solution:

Here, the observation with minimum and maximum values are 2 and 32 respectively.

∴ The class intervals are as follows:

0 – 5, 5 – 10, 10 – 15, 15 – 20, 20 – 25, 25 – 30, 30 – 35

The required frequency distribution table is

NCERT Solutions for Class 9 Maths Chapter 14 Statistics Ex 14.2 Q2.1