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Suppose x has a distribution with a mean of 50 and a standard deviation of 21. Random samples of size n = 36 are drawn.

Suppose x has a distribution with a mean of 50 and a standard deviation of 21. Random samples of size n = 36 are drawn.

(b)

Find the z value corresponding to = 57. (Enter an exact number.)

z =

(c)

Find P( < 57). (Enter a number. Round your answer to four decimal places.)

P(x < 57)

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