EBK BASIC BUSINESS STATISTICS
EBK BASIC BUSINESS STATISTICS
14th Edition
ISBN: 9780134685168
Author: STEPHAN
Publisher: YUZU
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Chapter 7, Problem 7PS

The diameter of a brand of tennis balls is approximately normally distributed, with a mean of 2.63 inches and a standard deviation of 0.03 inch. If you select a random sample of nine tennis balls,

a. what is the sampling distribution of the mean?

b. what is the probability that the sample mean is less than 2.61 inches?

c. what is the probability that the sample mean is between 2.62 and 2.64 inches?

d. The probability is 60% that the sample will be between what two values symmetrically distributed around the population mean?

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EBK BASIC BUSINESS STATISTICS

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