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Need help unit 4 . Question 2 1 pt 91 1 Details A manufacturer knows that their items have a normally distributed length, with a

Need help unit 4

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. Question 2 1 pt 91 1 Details A manufacturer knows that their items have a normally distributed length, with a mean of 18.4 inches, and standard deviation of 6 inches. If 21 items are chosen at random, what is the probability that their mean length is less than 20.7 inches

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