Consider the following frequency distribution representing the heights of 36 students of a class. Find the class mark of its modal class . *
Answers
Given : frequency distribution representing the heights of 36 students of a class.
To Find : class mark of its modal class
Solution:
Height in cm Number of Students
Class interval frequency
150 - 155 1
155 - 160 3
160 - 165 10
165 - 170 8
170 - 175 9
175 - 180 5
Modal class is the class with maximum frequency
Hence modal class is 160 - 165 as it has maximum frequency 10
Class Mark of 160 - 165 will be mid point
= (160 + 165)/2
= 162.5
Hence class mark of its modal class is 162.5
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