B. Construct a 95% confidence interval about u1-u2The confidence interval is the range from ? to ? round to the nearest two decimal places

Assume that both populations are normally distributed. Sample 1 Sample 2 a) Test whether u, # 12 at the a = 0.01 level of significance for the given sample data. n 14 14 19.8 b) Construct a 99% confidence interval about H1 - H2. X 22.6 5.2 5.1 Click the icon to view the Student t-distribution table. a) Perform a hypothesis test. Determine the null and alternative hypotheses. A. HO: My = 12, Hy: Hy # H2 OB. Ho: Hy = H2, H1: Hy

H2 OD. HO: Hy # H2, H1: Hy = H2 Determine the test statistic. t= - 1.44 (Round to two decimal places as needed.) Determine the critical value(s). Select the correct choice below and fill in the answer box(es) within your choice. (Round to three decimal places as needed.) O A. The critical value is O B. The lower critical value is The upper critical value is