Larry selects the portfolio for investment using historical data for 5 weeks before the current month. He uses price to earning ratio to select the portfolio. The data are given in a table. Requirements: 1. Test the hypothesis that the mean P/E ratio is the same for three investments. If no, apply the post-hoc test to make multiple comparisons. What portfolio is necessary to choose? 2. Test the hypothesis that the risk level for three portfolio is the same. Use 0.05 level of significance