A sample of 31 observations is selected from a normal populaticon. The sample mean is 11, and the population standard deviation is 3. Conduct the following test of hypothesis using the 0.05 significance level. Hus 10 H>10 a. Is this a one- or two-tailed test? o One-tailed test O Two-tailed test b. What is the decision rule? O Reject H when z> 1.645 when 2s 1645 Reject c. What is the value of the test statistic? (Round your answer to 2 decimal places.) Value of the test statistic 2 of 10 Next> 2 of 10 KPrev

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