Question 20 4 pts Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with a = 2.1%. A random sample of 25 Australian bank stocks has a sample mean of x =8.77%. For the entire Australian stock market, the mean dividend yield is / = 5%. Do these data indicate that the dividend yield of all Australian bank stocks is higher than 5%? Use a = 0.1. Are the data statistically significant at the given level of significance? Based on your answers, will you reject or fail to reject the null hypothesis? O The P-value is less than the level of significance and so the data are not statistically significant. Thus, we fail to reject the null hypothesis. O The P-value is less than the level of significance and so the data are statistically significant. Thus, we fail to reject the null hypothesis. O The P-value is greater than the level of significance and so the data are statistically significant. Thus, we fail to reject the null hypothesis. O The P-value is greater than the level of significance and so the data are not statistically significant. Thus, we fail to reject the null hypothesis. O The P-value is less than the level of significance and so the data are statistically significant. Thus, we reject the null hypothesis