A random sample of 14 large U.S. banks gave the following P/E ratios. 24, 16, 22, 14, 12, 13, 17, 22, 15, 19, 23, 13, 11, 18. The sample mean is x=17.1. Suppose a certain stock has a mean 18. Assume...

A random sample of 14 large U.S. banks gave the following P/E ratios. 24, 16, 22, 14, 12, 13, 17, 22, 15, 19, 23, 13, 11, 18. The sample mean is x=17.1. Suppose a certain stock has a mean 18. Assume that x has a normal distribution and a standard deviation of 4.7. Do these data ibdicatecthat the P/E ratio of all U.S. bank stocks is less than 18. Use a=0.10. What is the level of significance? Compute the z value of the sample test. Find the P value.