Explain your answers. Qualitative Variables Categories Statistics course letter grade ABACA Door choice on Let’s Make A Deal Door # 1 Door #2 Personal computer ownership Yes No Restaurant rating Incoming tax filing status Married filing jointly; Married filing separately; Single; Head of household; Qualifying widow(ere) 3. Explain how to take a systematic sample of 100 companies from the 1,853 companies that are members of an industry trade association. 4. Explain how a stratified random sample is selected. 5.
Marketing researchers often use city blocks as clusters in cluster sampling. Using this fact, explain how a market researcher might use multistage cluster impaling to select a sample of consumers from all cities having a population of more than 10,000 in a large state having many such cities. 6. Forbes magazine publishes the Forbes Platinum 400 -a list of the “Best Big Companies in America” as selected by the magazine’s writers and editors. Table above gives the best companies in the retailing industry as given in this list on the Forbes website on March 16, 2005. . Construct a stem-and-leaf display of the profit margin percentages for the best performing retailers as given in Table. Use the whole numbers from 1 to 24 as the stems. Then describe the distribution of profit margins. B. Construct a stem-and leaf display of the return on capital percentages for the retailers in Table. Use the whole numbers from 0 to 33 as the stems. Then describe the distribution of the return. C. Compare the distributions of the profit margins and return on capital percentages. D.
Calculate x, s 2 , and s for the expense data. B. Assuming that the distribution of entertainment expenses is approximately normally distributed, calculate estimates of tolerance intervals containing 68. 26 percent, 95. 44 percent, and 99. 73 percent of all entertainment expenses by the sales force. C. If a member of the sales force submits an entertaining expense (dinner cost for four) of $190, should this expense be considered unusually high (and possibly worthy of investigation by the company)? Explain your answer.