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 accompanying table shows a portion of the P$/$E ratios for $30$ firms. a$.$ Calculate the $25$th$,50$th$,$ and $75$th percentiles 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 accompanying table shows a portion of P $/$ E ratios for $30$ firms. b$.$ Calculate the value of the test statistic and the p$-$value.