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). Complete parts? (a) through? (d) below
Financial Energy Utilities
10.73 12.89 11.88
15.12 13.91 5.76
17.01 6.33 13.67
5.07 11.23 9.82
19.59 18.93 3.95
8.21 20.73 3.44
10.38 9.60 7.11
6.75 17.40 15.70
(c) Are the mean rates of return different at the alphaequals0.05 level of? significance?
Use technology to find the? F-test statistic for this data set.
(d)Find the P-value.