3 6.25 points ! Given the following hypotheses: H:10 A random sample of 10 observations is selected from a normal population. The sample mean was 19 and the sample standard deviation 3.8. Using the 01 significance level: a. State the decision rule. (Round your answer to 3 decimal places.) b. Compute the value of the test statistic. (Negative answers should be indicated by a minus sign. Round your answer to 3 decimal places.) val of the best saale c. What is your decision regarding the null hypothesis?