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 54.8 inches. This average is maintained by periodically testing random samples of 25 tennis balls. If the t-value falls between -to.99 and to.99. then 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 of the sample is 56.5 inches and the standard deviation is 0.25 inch. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls? Find -to.99 and to.99- - to.99 to.99 (Round to three decimal places as needed.) =
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 54.8 inches. This average is maintained by periodically testing random samples of 25 tennis balls. If the t-value falls between -to.99 and to.99. then 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 of the sample is 56.5 inches and the standard deviation is 0.25 inch. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls? Find -to.99 and to.99- - to.99 to.99 (Round to three decimal places as needed.) =
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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Question
![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 54.8 inches. This average is maintained by periodically
testing random samples of 25 tennis balls. If the t-value falls between -to.99 and to.99.
then 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 of the
sample is 56.5 inches and the standard deviation is 0.25 inch. Assume the bounce
heights are approximately normally distributed. Is the company making acceptable
tennis balls?
Find -to.99 and to.99-
- $0.99 =
to.99
(Round to three decimal places as needed.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F431762f5-aede-4bb5-a04d-ecad59d2e305%2F56804eb7-708c-493a-9555-a7fbff798fc5%2Fjrg9zzg_processed.jpeg&w=3840&q=75)
Transcribed Image Text: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 54.8 inches. This average is maintained by periodically
testing random samples of 25 tennis balls. If the t-value falls between -to.99 and to.99.
then 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 of the
sample is 56.5 inches and the standard deviation is 0.25 inch. Assume the bounce
heights are approximately normally distributed. Is the company making acceptable
tennis balls?
Find -to.99 and to.99-
- $0.99 =
to.99
(Round to three decimal places as needed.)
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