Height and age: Are older men shorter than younger men? According to a national report, the mean height for U.S. men is 69.4 inches. In a sample of 117 men between the ages of 60 and 69, the mean height was x 68.9 inches. Public health officials want to determine whether the mean height u for older men is less than the mean height of all adult men. Assume the population standard deviation to be -2.76. Use the a-0.01 level of significance and the P-value method with the TI-84 calculator. Part 1 of 4 State the appropriate null and alternate hypotheses. Ho: u = 69.4 : < 69.4 This hypothesis test is a left-tailed test. Part: 1/4 Part 2 of 4 Compute the P-value. Round the answer to at least four decimal places. P-value= Save For Later Submit Assignment