1. You construct three 88% confidence intervals: A. f-interval with 6 degrees of freedom. B. f-interval with 2 degrees of freedom. C. =-interval based upon a sample of size n = 30. Assuming the standard deviation is the same for all three intervals, write the three intervals (A, B, and C) in order, from narrowest to widest. 2. Find the critical value ?" that you would use for a confidence interval for a population mean # in each of the following settings. (a) A 95% confidence interval based on a random sample of 20 observations (b) A 90% confidence interval from an SRS of 51 observations. 3. Below are graphical representations of two different samples from two different populations. In each case, discuss whether the Normal/Large Sample condition for constructing a one-sample f interval has been satisfied. (a) 2 012 6 67 [= = 12] [m = 45] (b) 03 10 20 30