Question

A company manufactures is on When tenis b are dropped on a concrete w ace from a height of 100 inches the company was the mean height the ball bounce upward to be 54.6 inches. This average is maintained by periodical testing random samples of 25 tennis balls the value os benen-toe and to then the company will be said that is manchuring acceptable bas. A sample of 25 balls is randomly selected and tested. The mean bounce height of the sample is 56.4 inches and the standard deviation is 0.25inch Assume the bounce heights are approximately normally distributed is the company making acceptable tennis bali? Find - 9o and logo -0.90 - 0 6.00 - 0 (Round to three decimal places as needed.)

Answer 1

Given data balls are randomly Selected and S tennis So tested a4 as- degrees of frecdom df forto.0 and trom t disti bution -for o 0.a and critical degrees of freedom df= 4 318 t- value 090 I318 toiao tto.90 3 18 Scanned with CS CamScanner