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The times that customers spend in a book store are normally distributed with a mean of 39.5 minutes and a standard deviation of 9.4 minutes.

The times that customers spend in a book store are normally distributed with a mean of 39.5 minutes and a standard deviation of 9.4 minutes. A random sample of 25 customers has a mean of 36.1 minutes. Would this outcome be considered unusual, so that the store should reconsider its displays?

Yes, the probability of this outcome at 0.965 would be considered unusual, so the display should be redone

Yes, the probability of this outcome at 0.035, would be considered unusual, so the display should be redone

No, the probability of this outcome at 0.035, would be considered usual, so there is no problem

No the probability of this outcome at 0.359 would be considered usual, so there is no problem

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