subject
Mathematics, 09.08.2019 17:20 u8p4

Acompany 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 55.4 inches. this average is maintained by periodically testing random samples of 25 tennis balls. if the t-value falls between minusāˆ’t 0.90 and t 0.90, 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 56.6 inches and the standard deviation is 0.25 inch. assume the bounce heights are approximately normally distributed.
is the company making acceptable tennis balls?

ansver
Answers: 2

Another question on Mathematics

question
Mathematics, 20.06.2019 18:04
At a point on the ground 50 meters from the foot of a tree, the angle of elevation to the tree is 48Ā°. find the height of the tree to the nearest meter.
Answers: 1
question
Mathematics, 21.06.2019 16:00
One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7
Answers: 2
question
Mathematics, 21.06.2019 18:00
What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18
Answers: 1
question
Mathematics, 21.06.2019 18:00
Solve this and show youā€™re work step by step ! -5 3/4+3h< 9 1/4 -
Answers: 1
You know the right answer?
Acompany manufactures tennis balls. when its tennis balls are dropped onto a concrete surface from a...
Questions