In the past an autoobile repair shop owner has noticed that, Ask an Expert

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In the past an autoobile repair shop owner has noticed that sales increased ats certain economic indicators decreased. Based on forecasts of these economics indicators and past observations, the owner has assigned probabilities to sales increases as follows:

Sales increase Probability
5% 0.05
10% 0.15
15% 0.35
20% 0.30
25% 0.15

find out the expected sales increase and the standard deviation

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9116404

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