Wayne\'s uncle Bob owns two appliance stores. In store 1 the number of TV sets s

Question

Wayne's uncle Bob owns two appliance stores. In store 1 the number of TV sets sold by a saleperson is, on average, 13 per week with a standard deviation of 5. In store 2 the number of TV sets sold by a salesperson is, on average, 7, with a standard deviation of 4. Bob has a position open for a person to sell TV sets. There are two applicants, Jerry and Marney. Bob asks Jerry to work in store 1 and Marney to work in store 2 for a week. Jerry sold 10 TVs in store 1, and Marney sold 6. If Bob makes a decision based on solely on this information, who do you think he he hire and why?

Explanation / Answer

jerry - store 1 , X1 = 10 , mean 1 = 13 , sd = 5

Z1 = (X - mean)/sd = (10 -13)/5 = -0.6

Marney

store 2 , X2 = 6 , mean 2 = 7 , sd = 4

Z2 = (6 - 7)/4 = -0.25

since Z2 > Z1

he should hire 2 Marney

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