Questions 17,18

17. Are America's top chief executive officers (CEOs) really worth all that money? One way to answer this question is to look at row B, the annual company percentage increase in revenue, versus row A, the CEO's annual percentage salary increase in that same company. Suppose a random sample of companies yielded the following data: B: Percent increase for company: A: Percent increase for CEO: 12 18 14 18 6 4 21 37 18 28 22 14 -4 19 15 30 Do these data indicate that the population mean percentage increase in corporate revenue (row B) is different from the population mean percentage increase in CEO salary? Use a 10% level of significance. a. Hypotheses. b. Sample test statistic: b Find test statistics (show formula and final answer with two decimals) C. Find P-value and compare it with a. Do you reject or fail to reject the null hypothesis? e. Conclusion: 18. Is there a relationship between marital status and happiness? The data in the table show the marital status and happiness of individuals who participated in the General Social Survey. Use the chi-square test to determine if the listed occupations and personality preferences are independent at the 0.05 level of significance. Round E values to two decimal places. Marital Status Happiness Married Not married Very happy 700 280 Pretty happy 820 955 Not too happy 95 20 a. Write both alternative and null hypothesis. b. Find test statistics (write formula and round to two decimal places) C. P-value d. Decision e. Interpret your conclusion in the context of the application: antities that appeared in the article ducts Research