6. [-/3 Points] DETAILS MENDSTATC4 10.E.089.S. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Use Table 4 in Appendix I or using SALT to find the following critical values. (Round your answers to three decimal places.) LA USE SALT (a) An upper one-tailed rejection region with a = 0.05 and 11 df. t = (b) A two-tailed rejection region with a = 0.05 and 7 df. It1 = (c) A lower one-tailed rejection region with a = 0.01 and 12 df. t = Need Help? Read It 7. [-/6 Points] DETAILS MENDSTATC4 10.E.081.S. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A random sample of n = 14 observations from a normal population produced x = 47.5 and s2 = 4.1. Test the hypothesis Ho: M = 48 against Ha: M # 48 at the 5% level of significance. LA USE SALT State the test statistic. (Round your answer to three decimal places.) t = State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.) t > t