The average height of 18-year-old males is 70 inches. A random sample of sixteen 18-year-old males is selected. The average heights and standard deviation of heights came out to be 68.8 and 8 inches, respectively. At level of significance can we conclude that the average height has changed? = .01 a) Set up test hypothesis b) Write test statistics and sketch. c) Apply classical or P-value method d) Draw conclusion and interpret.