4.28 A factory manager is considering whether to replace a temperamental machine. A review of past records
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4.28 A factory manager is considering whether to replace a temperamental machine. A review of past records indicates the following probability distribution for the number of breakdowns of this machine in a week.
Number of breakdowns 0 1 2 3 4 Probability 0.10 0.26 0.42 0.16 0.06
a. Find the mean and standard deviation of the number of weekly breakdowns.
b. It is estimated that each breakdown costs the company
$1,500 in lost output. Find the mean and standard deviation of the weekly cost to the company from breakdowns of this machine.
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Related Book For
Essential Mathematics And Statistics For Science
ISBN: 9780470694480
2nd Edition
Authors: Graham Currell, Dr. Antony Dowman
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