The less-than cumulative frequencies of the ages of 100 policy holders are: under 30 – 10, under 40 – 28, under 50 – 55, under 60 – 82, under 70 – 100 (youngest holder is 20). By how much does the median age exceed the mean age?

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0.65 years. Frequencies: 10, 18, 27, 27, 18 with class marks 25–65. Mean =4750/100=47.5. Median: N/2 = 50, class 40–50, 40+50-28/27×10 48.15. Difference 0.65 years.

The less-than cumulative frequencies of the ages of 100 policy holders are: under 30 – 10, under 40 – 28, under 50 – 55, under 60 – 82, under 70 – 100 (youngest holder is 20). By how much does the median age exceed the mean age?

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