The heights are measured for a simple random sample of 9 supermodels. They have a mean of x= 70.0 inches and a standard deviation ofs= 1.5 inches. A data set of 40 randomly selected women who are not supermodels has a mean of x= 63.2 inches and a standard deviation of s= 1.27 inches. Use a 0.01 significance level to test the claim that the mean height of supermodels is greater than the mean height of women who are not supermodels.
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The heights are measured for a simple random sample of 9 supermodels. They have a
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