Statistics

Example 3: Intervals and Tests Using the confidence interval given, indicate the conclusion of the test and indicate the significance level used. a. A 95% confidence interval for a mean u is 12.5 to 17.1. Testing Ho: H = 18 vs Ha: H # 18. b. A 90% confidence interval for a proportion p is 0.62 to 0.80. Testing Ho: p = 0.65 vs Ha: p # 0.65. c. A 99% confidence interval for a difference in proportions is - 0.10 to 0.20. Testing Ho: p1 = p2 VS Ha: P1 # p2