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A manufacturer knows that their items have a normally distributed length, with a mean of 18.4 inches, and standard deviation of 3.4 inches. If 24

A manufacturer knows that their items have a normally distributed length, with a mean of 18.4 inches, and standard deviation of 3.4 inches.

If 24 items are chosen at random, what is the probability that their mean length is less than 16.9 inches?

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