Mathematics

Mathematics

Problem

The weekly wages of 200 randomly selected steel workers are given alongside: For the given data, estimate the:

Wage ($W)	Number of workers
$720 \le W < 740$	17
$740 \le W < 760$	38
$760 \le W < 780$	47
$780 \le W < 800$	57
$800 \le W < 820$	18
$820 \le W < 840$	10
$840 \le W < 860$	10
$860 \le W < 880$	3

a. mean b. standard deviation.

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