A sample of 41 observations Is selected from a normal population. The sample mean is 26. and the population standard deviation Is 4. Conduct the following test of hypothesis using the 0.05 significance level. He: Us 25 My: U > 25 a. Is this a one- or two-talled test? 00:55-23 O "One-tailed"-the alternate hypothesis is greater than direction. O "Two-talled"-the alternate hypothesis Is different from direction. b. What is the decision rule? (Round your answer to 2 decimal places.) HO, when z > c. What is the value of the test statistic? (Round your answer to 2 decimal places.) Value of the test statistic d. What Is your decision regarding Me?He: H = 540 HI: P = 540 A random sample of 10 observations is selected from a normal population. The sample mean was 550 and the sample standard deviation 6. Using the 0.10 significance level: a. State the decision rule. (Negative amount should be indicated by a minus sign. Round your answers to 3 decimal places.) Reject Hy when the test statistic is the interval ( b. Compute the value of the test statistic. (Round your answer to 3 decimal places.) Value of the test statistic C. What is your decision regarding the null hypothesis? O Reject O Do not reject