Answer to Question #261566 in Statistics and Probability for shyla

Question

A survey of all the 113 firms in a small state was carried out to find the number of people employed at 

each of the sectors. The results are shown in the following table.

Number of Employees 1 – 10, 11– 20, 21 – 30, 31 – 40, 41 – 50

Frequency             35,     34,    14,       12,      18

(i) Find the mean. 

(ii) Calculate the standard deviation.

(iii) Find the median.

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