Let X be a random variable representing dividend yield of Australian bank stocks. We may assume that X has a normal distribution with standard deviation 0 = 2.4% . A random sample of 19 Australian bank stocks has a sample mean of :2 = 8.71%. For the entire Australian stock market, the mean dividend yield is I1 = 5.9%. Do these data indicate that the dividend yield of all Australian bank stocks is higher than 5.9%? Use a = .05. 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