Determine the expected value-variance and standard deviation

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Amy wants to estimate the average number of items per purchase at the express lane of a local grocery store. She has estimated the following probabilities based on a sample size of 50 customers. Determine the expected value, variance, and standard deviation of items per purchase.

tems per Purchase Probability

1 0.29

2 0.16

3 0.15

4 0.18

5 0.22

Reference no: EM13772675

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