You are here (click or tap to change) Back to Chapter 8 Main Page
Example 128
Example 128: In previous tests, baseballs were dropped 24ft onto a concrete surface, and they bounced an average of 92.84 inches. In a test of a sample of 28 new balls, the bounce heights had a mean of 92.67 inches and a standard deviation of 1.79 inches. Use a 5% level of significance to test the claim that the new balls have a mean bounce height different from 92.84.
Ask the Professor