Chapter 10, Problem 9E

Given the following hypotheses:

$\begin{array}{c}{H}_0:\text{μ}\le \text{10}\\ H_1:\text{μ}>\text{10}\end{array}$

A random sample of 10 observations is selected from a normal population. The sample mean was 12 and the sample standard deviation 3. Using the .05 significance level:

1. a. State the decision rule.
2. b. Compute the value of the test statistic.
3. c. What is your decision regarding the null hypothesis?