4. In a large population, sixty five percent of all couples filing for divorce cite incompat- ibility as the underlying reason for divorce. If we select four couples filing for divorce from this population, what is the probability that at least one of the four couples will state incompatibility as the reason for divorce? Round your answer to three decimal places. P= 657. (a) 0.015 n = 4 (b) 0.821 at lead 1 (c) 0.179 () 0.985 (c) 0.162 5. I did a test of the null hypothesis Ho : / = 65 against the alternative Ha : # > 65 based on a sample of size n = 26. Based on this test I rejected the null hypothesis at a = 0.1 but cannot reject at a = 0.05. One of the values given below is the value of the test statistic that I calculated. Which one? Note: I am not giving you enough information to calculate the value of the test statistic. But you do have enough information to figure out which one of the values given below must be that valuc. (a) 2.05 -