4 (15 points) Let 011 > 0, Gig > 0 With 011 +052 = 05. Then X# 0M? PT(Za1

4 (15 points) Let al > 0, > 0 with 01 + = a. Then Pr(-zm < < ZQ2) 4.1 5 points Use this equation to write down a 100(1 a)% confidence interval for V. condition CI is symmetric around X? 4.2 10 points Under what Let a = 0.05, al = a/4, and = 30/4. Does this result in a narrower or wider interval than symmetric case where al = = a/ 2?