Question: The question is under sampling distribution topic. My answers are wrong. Please show detailed steps in solving the question. Thank you. A manufacturer knows that

The question is under sampling distribution topic. My answers are wrong. Please show detailed steps in solving the question. Thank you.

A manufacturer knows that their items have a normally distributed length, with a mean of 7 inches, and standard deviation of 1.5 inches. If 4 items are chosen at random, what is the probability that their mean length is less than 8.4 inches? Enter your answers as numbers accurate to 4 decimal places. Submit

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