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Find the mean and median of the following data:

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We have n = 250

So, 2/2 = 250/2 = 125

The cumulative Frequency just greater than n/2 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,

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