Repairs. The probability model below describes the number of repair calls that an appliance repair shop may

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Repairs. The probability model below describes the number of repair calls that an appliance repair shop may receive during an hour.

Repair Calls 0 1 2 3 Probability 0.1 0.3 0.4 0.2

a) How many calls should the shop expect per hour?

b) What is the standard deviation?

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Business Statistics

ISBN: 9781292269313

4th Global Edition

Authors: Norean Sharpe, Richard De Veaux, Paul Velleman

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