A stock analyst wondered whether the mean rate of return of? financial, energy, and utility stocks differed over the past 5 years. He obtained a simple random sample of eight companies from each of the three sectors and obtained the? 5-year rates of return shown in the accompanying table? (in percent).(A) Are the mean rates of return different at the a=0.05 level of? significance? Use technology to find the? F-test statistic for this data set.(B) Determine the? P-valueData:Financial Energy Utilities10.76 12.89 11.9815.12 13.96 5.8617.01 6.43 13.465.07 11.23 9.8219.50 18.93 3.958.16 20.73 3.4410.38 9.60 7.116.75 17.40 15.70
Stock analysis
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