Question

(1 point) (Give answers to at least two decimal places. For simplicity, use the standard normal distribution bacause the samples are both large.) In order to compare the means of two populations, independent random samples of 246 observations are selected from each population, with the following results: Sample 1 Sample 2 (a) Use a 96 % confidence interval to estimate the difference between the population means (M1-M2). (b) Test the null hypothesis: Ho : (41-42-0 versus the alternative hypothesis: 11 : Ci-H2) 0. Using α-004, give the following: the test statistic z The final conclusion is A. There is not sufficient evidence to reject the null hypothesis that (M1-μ2)-0. B. We can reject the null hypothesis that ( 1-2)-0 and conclude tha(μι-μ) 0. (c) Test the null hypothesis: Ho : (씨 μ2) = 28 versus the alternative hypothesis: Ha : (씨 μ2)メ28. Using α = 0.04, give the following: the test statistic z The final conclusion is A. There is not sufficient evidence to reject the null hypothesis that (11-H2)-28. B. We can reject the null hypothesis that (M1-12-28 and conclude that(μ,-μ2) * 28.

Answer 1