Statistics Solutions

[Solution] (8-5) In a test in a previous year, baseballs were dropped 24 feet onto a concrete surface, and bounced an average of 92.84 in. In a test of

Question: (8-5) In a test in a previous year, baseballs were dropped 24 feet onto a concrete surface, and bounced an average of 92.84 in. In a test of a sample of 40 new balls, the bounce heights had a mean of 92.67 in. and a standard deviation of 1.79 in. 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 92.84 in. Does it appear that the new baseballs are different?

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