In previous? tests, baseballs were dropped 24 feet onto a concrete? surface, and they bounced an average of inches. In a test of a sample of 20 new? balls, the bounce heights had a mean of 92.58 inches and a standard deviation of 1.77 inches. Use a 0.05 significance level to determine whether there is sufficient evidence to support the claim that the new balls have bounce heights with a mean different from 92.86 inches. Does it appear that the new baseballs are? different?