A manufacturer knows that their items have a lengths that are approximately normally distributed, with a mean of 7.5 inc

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answerhappygod
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A manufacturer knows that their items have a lengths that are approximately normally distributed, with a mean of 7.5 inc

Post by answerhappygod »

A manufacturer knows that their items have a lengths that are
approximately normally distributed, with a mean of 7.5 inches, and
standard deviation of 2.1 inches.

If 37 items are chosen at random, what is the probability that
their mean length is greater than 7.8 inches?

(Round answer to four decimal places)
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