Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with= 2.8%.A random sample of 16 Australian bank stocks has a sample mean dividend yield of 8.91%. For the entire Australian stock market, the mean dividend yield is=6.4%.Ifyou wanted to test to determine ifthese data indicate that the dividend yield of all Australian bank stocks is higher than 6.4%, what is the value of the test statistic?Place your answer, rounded to 3 decimal places