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. Click the icon to view the data table (a) State the null and alternative hypotheses. Choose the correct answer below. O A. Ho Hfinancial = Henergy = Hutilities and H, : at least one of the means is different O B. Ho Mfinancial = Henergy = Mutilities and H1 Hfinancial