The time taken, in seconds, to solve a problem by each of 25 pupils is as follows:
Construct a frequency distribution for these data, using a class interval of 10 seconds.

Given:

The time taken, in seconds, to solve a problem by each of 25 pupils is as follows:
16, 20, 26, 27, 28, 30, 33, 37, 38, 40, 42, 43, 46, 46, 46, 48, 49, 50, 53, 58, 59, 60, 64, 52, 20

To do:

We have to construct a frequency distribution for these data, using a class interval of 10 seconds.

Solution:

The frequency distribution for the given data, using a class interval of 10 seconds is,

Lowest observation $= 16$

Highest observation $= 64$

Time taken (in sec)Tally marksNumber of problems
10-20|||1
20-30||||5
30-40||||4
40-50|||| |||
8
50-60||||
5
60-70||2
Total
25

Updated on: 10-Oct-2022

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