Statistical Analysis of Salesmen Age Distribution

Statistical Analysis of Salesmen Age Distribution

A sample of 30 salesmen was surveyed and the ages of each of the salesman are given as follows:

Age	\(21\)	\(22\)	\(23\)	\(24\)	\(25\)	\(26\)	\(27\)	\(28\)
Frequency	\(3\)	\(3\)	\(4\)	\(6\)	\(7\)	\(4\)	\(2\)	\(1\)

Calculate the unbiased estimates of the population mean and variance.

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Answer:\(\bar x=24.2,\quad s^2=\frac{494}{145}\approx3.41\text{ (3 s.f.)}\)

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