Solved: In Exercises 520, assume that the two samples are

Chapter 9, Problem 18

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In Exercises 520, assume that the two samples are independent simple random samplesselected from normally distributed populations, and do not assume that the populationstandard deviations are equal. Do the following:a. Test the given claim using the P-value method or critical value method.b. Construct a confidence interval suitable for testing the given claim. Heights of Supermodels Listed below are the heights (inches) for the simple randomsample of supermodels Lima, Bundchen, Ambrosio, Ebanks, Iman, Rubik, Kurkova, Kerr,Kroes, and Swanepoel. Data Set 1 in Appendix B includes the heights of a simple randomsample of 40 women from the general population, and here are the statistics for those heights:n = 40, x = 63.7815 in., and s = 2.59665 in. Use a 0.01 significance level to test the claimthat the supermodels have heights with a mean that is greater than the mean height of womenin the general population.70 71 69.25 68.5 69 70 71 70 70 69.5

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