11:02 Done 33 of 33 Rotate Drustles Size Color board Image Tools Shapes 15 Rates of return (annualized) In two Investment portfolios are compared over the last 12 quarters. They are considered similar In safety but portfolio B is advertised as being "less volatile." (a) At a = .025, does the sample show that portfolio A has significantly greater variance In rates of return than portfolio B? (b) At a = .025, Is there a significant difference In the means? nts Portfolio A Portfolio B 5.23 8.96 10.91 8.60 12.49 7.61 4.17 6.60 Book 5 54 7.77 8.68 7.06 7. 89 7.68 9.82 7.62 References 9.62 8.71 4.93 8.97 11.66 7.71 11.49 9.91 picture Click here for the Excel Data File (a-1) Choose the appropriate hypotheses. Assume A" Is the variance of the Portfolio A and o is the variance of the Portfolio B. Ho: GA2/08 51 versus H. DA 10p2 = 1 versus Hi CAT HO OA 10 B 2 212 2 1 versus Hi OA JOB (a-2) Specify the decision rule. (Round your answers to 2 decimal places.) Reject the null hypothesis if Feld - (a-3) Calculate the test statistic For (Round your answer to 2 decimal places.) Fcale (a-4) What is your conclusion? We reject I the null hypothesis (b-1) Choose the appropriate hypotheses. Assume d= employee assessed value. O HO: H1 - 12 2 0 VS. 14: 4 - 1260 O HO : W/1 - #2 50 VS . Hit - 12 2 0 (b-2) State the decision rule for .01 level of significance. (Round your answers to 3 decimal places. A negative value should be Indicated by a minus sign.) Reject the null hypothesis If teale