A grouped distribution has median class 60-70 with l = 60, h = 10, f = 25. The cumulative frequency just before the median class is 40 and the median works out to 64. Find the total number of observations n.

Question

Accepted Answer

100. 64 = 60 + n/2 - 40/25 × 10. So 4 = n/2 - 40/2.5, giving n/2 - 40 = 10, n/2 = 50, n = 100.

A grouped distribution has median class 60-70 with l = 60, h = 10, f = 25. The cumulative frequency just before the median class is 40 and the median works out to 64. Find the total number of observations n.

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