tennis balls are dropped onto a concrete surface from a height of 100 inches, the company wants the mean height the balls bounce upward to be 55.5 inches. This average is maintained by periodically testing random samples of 25 tennis balls. If the t-value falls between a 99% confidence interval, the company will be satisfied that it is manufacturing acceptable tennis balls. A sample of 25 balls is randomly selected and tested. The mean bounce height is 56.0 inches and the standard deviation is 0.25 inches. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls? Explain your answer.
tennis balls are dropped onto a concrete surface from a height of 100 inches, the company wants the mean height the balls bounce upward to be 55.5 inches. This average is maintained by periodically testing random samples of 25 tennis balls. If the t-value falls between a 99% confidence interval, the company will be satisfied that it is manufacturing acceptable tennis balls. A sample of 25 balls is randomly selected and tested. The mean bounce height is 56.0 inches and the standard deviation is 0.25 inches. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls? Explain your answer.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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2. Tennis Ball Manufacturing A company manufactures tennis balls. When its
tennis balls are dropped onto a concrete surface from a height of 100 inches, the
company wants the mean height the balls bounce upward to be 55.5 inches.
This average is maintained by periodically testing random samples of 25 tennis
balls. If the t-value falls between a 99% confidence interval, the company will
be satisfied that it is manufacturing acceptable tennis balls. A sample of 25
balls is randomly selected and tested. The mean bounce height is 56.0 inches
and the standard deviation is 0.25 inches. Assume the bounce heights are
approximately normally distributed. Is the company making acceptable tennis
balls? Explain your answer.
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