The times that customers spend in a book store are normally distributed with a mean of 39.5 minutes and a standard

deviation of 15.9 minutes. A random sample of 25 customers has a mean of 36.1 minutes or less. Would this outcome be considered unusual, so that the store should reconsider its displays?

A. No, the probability of this outcome at 0.142, would be considered usual, so there is no problem

B. Yes, the probability of this outcome at 0.858 would be considered unusual, so the display should be redone

C. Yes, the probability of this outcome at 0.142, would be considered unusual, so the display should be redone

D. No the probability of this outcome at 0.415 would be considered usual, so there is no problem

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