10.117 Multiple choice: Comparing mean incomes A study compares the population mean annual incomes for Hispanics 1m12...

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10.117 Multiple choice: Comparing mean incomes A study compares the population mean annual incomes for Hispanics 1m12 and for whites 1m22 having jobs in construction, using a 95% confidence interval for m1 - m2.

Choose the best correct choice.

a. If the confidence interval is 1 -6000, -30002, then at this confidence level we conclude that the mean income for whites is less than for Hispanics.

b. If the confidence interval is 1 -3000, 10002, then the test of H0: m1 = m2 against Ha: m1 m2 with significance level 0.05 rejects H0.

c. If the confidence interval is 1 -3000, 10002, then we can conclude that m1 = m2.

d. If the confidence interval is 1 -3000, 10002, then we are 95% confident that the population mean annual income for Hispanics is between 3000 less and 1000 more than the population mean annual income for whites.

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Related Book For  book-img-for-question

Statistics The Art And Science Of Learning From Data

ISBN: 9781292164878

4th Global Edition

Authors: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg

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