Question
(6.2) 5 A company manufactures tennis balls. When its tennis balls are dropped onto a concrete surface from a height of 100 inches, the company
(6.2) 5
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
55.2
inches. This average is maintained by periodically testing random samples of
25
tennis balls. If the t-value falls between
t0.98
and
t0.98,
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
56.1
inches and the standard deviation is
0.25
inch. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls?
Question content area bottom
Part 1
Find
t0.98
and
t0.98.
t0.98 | = | enter your response here |
t0.98 | = | enter your response here |
(Round to three decimal places as needed.)
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