of 2 part 2 Stock screeners are automated tools used by investment companies to help clients select a portfolio of stocks to invest in. Critics say that these screeners often underperform stock market averages like the S&P500. Shown below are data on annual return (%) for a random sample of stock screeners for the year 2012. We'd like to know whether the mean annual return for all such stock screeners in 2012 was less than 16%, the annual return of the S&P500 that year. Use = 0.05. Return 9.0 0.1 1.6 14.6 16.0 7.7 19.9 9.8 3.2 24.8 17.6 10.7 9.1 Question 1 of 4 Use Minitab to construct a normal probability plot of the annual return data and report the value of the AndersonDarling statistic. AD = __________(3 decimal places) Question 2 of 4 Use Minitab to conduct the appropriate test. Report the value of the test statistic and pvalue below. test statistic = _______(2 decimal places) pvalue = _______ (3 decimal places) Question 3 of 4 Use Minitab to calculate a 95% confidence interval for . Remember to specify a two tailed Ha to get the usual confidence interval with two endpoints. ( ________,_________ ) (2 decimal places) Question 4 of 4 Explain how the 95% confidence interval could be used to make a statement about the hypothe ses. Part 2 of 2 A manufacturer of small appliances employes a market research firm to look into sales of its products. Shown below are last month's sales of electric can openers from a random sample of 50 stores. The manufacturer would like to know if there is convincing evidence in these data that the mean can opener sales for all stores last month was more than 20. Sales 19 19 16 19 25 26 24 63 22 16 13 26 34 10 48 16 20 14 13 24 34 14 25 16 26 25 25 26 11 79 17 25 18 15 13 35 17 15 21 12 19 20 32 19 24 19 17 41 24 27 Copy the data to a Minitab worksheet. Question 1 of 5 Set up the null and alternative hypotheses. Define the parameter in context. Question 2 of 5 First use Excel to calculate the sample standard deviation, s. Then use the value of s to as many decimal places as you can to conduct the appropriate hy pothesis test in Minitab. Report the value of the test statistic and pvalue below. test statistic =___________(2 decimal places) pvalue = _______ (3 decimal places) Question 3 of 5 What is your decision using = 0.05? A.reject Ho B.do not reject Ho C.accept Ho Question 4 of 5 State your conclusion in context Question 5 of 5 Save your Minitab and Excel files, please. Thanks