Q17 of 69 Page 7

Find the mean and median of the following data:


Now,



⇒x̄ = 45 + 5.44


⇒x̄ = 50.44



We have n = 250


So,


The cumulative Frequency just greater than is 127 then the median class is 50-60 such that


the lower limit (l) = 50


cumulative frequency of the class preceding 50 – 60 (cf) = 96


frequency of the median class 50 – 60 = 31,


class size (h) = 10


Using the formula,,we have



= 50 + 9.35


= 59.35


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