Random samples of size n 5 64 are drawn. (a) Describe the x distribution and compute the

Question:

Random samples of size n 5 64 are drawn.

(a) Describe the x distribution and compute the mean and standard deviation of the distribution.

(b) Find the z value corresponding to x 5 9.

(c) Find P(x . 9).

(d) Interpretation Would it be unusual for a random sample of size 64 from the x distribution to have a sample mean greater than 9? Explain.

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