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 4 observations are selected from each population, with the following results: Sample 1 Sample 2 81 -15582-125 Use a 97 % confidence interval to estimate the difference between the population means (M1-12). -304.502 (b) Test the null hypothesis: H0 the test statistic z The final conclusion is (a) 41-42) 0 versus the alternative hypothesis H: μι μ)メ0 Using α 0.03 give the following IS O A. There is not sufficient evidence to reject the null hypothesis that (μ1-μ2)-0 O B. We can reject the null hypothesis that (μ1-49)-0 and conclude that (μι-μ2) 0 Test the null hypothesis Ho : (μι the test statistic z The final conclusion is (c) μ) 30 versus the alternative hypothesis: Ha : μί μ2) 7k 30 Using α 0.03, give the following: O A. There is not sufficient evidence to reject the null hypothesis that (M1-μ)-30 . B. We can reject the null hypothesis that (μ,-μ2)-30 and conclude that (μι-μ) * 30.

Answer 1