A price-earnings ratio or P/E ratio is calculated as a firm's share price compared to the income or profit earned by the firm per share. Generally, a high P/E ratio suggests that investors are expecting higher earnings growth in the future compared to firms with a lower P/E ratio. The data accompanying this exercise show P/E ratios for 30 firms. Click here for the Excel Data File a. Select the null and the alternative hypotheses in order to test whether the P/E ratio of all firms differs from 15. MO: N 15; MAE H 15 Hp: H = 15; HAHHW 15 b-1. Calculate the value of the test statistic. (Round final answer to 3 decimal places.) Test statistic B32 X wa B 1 2 3 net Firm 1 2 3 4 4 PE_Ratio 14 24 13 49 15 12 11 5 6 000 OWN 7 8 oo 6 7 8 | 8 9 9 10 11 12 13 14 15 . 16 0 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 12 20 13 10 15 8 19 11 15 17 8 19 17 17 11 21 20 18 13 44 14 16 N NNNNN 37 38 39