Answer :

To find modal class, find the greatest frequency.

Greatest frequency = 71


So, corresponding to this value of frequency, we get class = 14.2 – 14.6


Modal class = 14.2 – 14.6


So, upper class limit of modal class = 14.6


Lower class limit of modal class = 14.2


Difference = Upper class limit of modal class – Lower class limit of modal class


Difference = 14.6 – 14.2


Difference = 0.4


Thus, difference is 0.4.


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