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A sample of 36 observations is selected from a normal population. The sample mean is 49, and the population standard deviation is 5. Conduct the following test of hypothesis using the 0.05 significance level: He: U = 50 Hi- H # 50 a. Is this a one- or two-tailed test? (Click to select) v b. What is the decision rule? Reject He and accept , when z (Click to select) in the region from - 196 and 196 c. What is the value of the test statistic? (Negative answer should be indicated by a minus sign. Round the final answer to 2 deci places.) Value of the test statistic d. What is your decision regarding He? (Click to select) Ho