Question 4 {1 point} With all else constant, an increase in population standard deviation will shorten the length of a confidence interval. 0 True 0 False Question 5 {1 point} You want to rent an unfurnished one-bedroom apartment in Kitchener, ON. The mean monthhlr rent for a random sample of 2D apartments advertised on liliji is $1500 with a standard deviation of 52(1). A 90513 confidence interval is solved as: 01145231, 151129} 011422.531, 1551529} 011454.35, 155.55?) 0 None of the options listed Question 51:1 point} An experimenter measures the failure times of a random sample of 2D components. The sample mean is 52.43 hours and the sample standard variance is 15.45 hours. The failure times are app roximatelv Normal. Calculate the observed test statich to determine whether or not there is sufficient evidence for the experimenter to conclude that the average failure time of the components is greater than 5U hours 0 ones: 0 13325 0 3.2551 0 ooaso