The number of matchsticks in 40 boxes on counting was found.

The number of matchsticks in 40 boxes on counting was found as given below:
44, 41, 42, 43, 47, 50, 51, 49, 43, 42, 40, 42, 44, 45, 49, 42, 46, 49, 45, 49, 45, 47, 48, 43, 43, 44, 48, 43, 46, 50, 43, 52, 46, 49, 52, 51, 47, 43, 43, 45.
Taking classes 40-42, 42-44 ….., construct the frequency distribution table for the above data. Also draw a combined histogram and frequency polygon to represent the distribution.

Solution:

Class Intervals Tally Marks Frequency
40-42 II 2
42-44 IIII IIII II 12
44-46 IIII II 7
46-48 IIII I 6
48-50 IIII II 7
50-52 IIII 4
52-54 II 2
Total 40

Take class on x-axis and frequency on y-axis :

Statistics Class 9 ICSE ML Aggarwal img 22

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