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A simple random sample of 50 adults is obtained, and each person’s height is measured.The sample...

A simple random sample of 50 adults is obtained, and each person’s height is measured.The sample mean is 68 inches. The population standard deviation for heights is 2.35.

Use a 0.01 significance level to test the claim that the sample is from a population with a mean equal to 73, against the alternative hypothesis that the mean height is less than 73. (ASSUME Normal). (5 points)If z0.01=−2.32 and z0.005=−2.57 are numbers s.t.P(Z < z0.01) = 0.01 andP(Z < z0.005) = 2.57.

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