7.19 Refer to Exercise 7.17, part b. a. Sketch the sampling distribution for the sample mean and...

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7.19 Refer to Exercise 7.17, part

b. a. Sketch the sampling distribution for the sample mean and locate the mean and the interval 20/Vn along the x-axis.

b. Shade the area under the curve that corresponds to the probability that lies within 0.15 unit of the population mean .

c. Find the probability described in part b.

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