Given the following hypotheses: Ho 13 H: 13 A random sample of 10 observations is selected from a normal population. The sample mean was 14 and the sample standard deviation was 4.2. Using the 0.05 significance level: a. State the decision rule. (Round your answer to 3 decimal places.) Reject H0 if t> b. Compute the value of the test statistic. (Negative answers should be indicated by a minus sign. Round your answer to 3 decimal places.) Value of the test statistic c. What is your decision regarding the null hypothesis