A teacher believes that students will take 20 minutes to complete an assignment. A random selection...

  

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A teacher believes that students will take 20 minutes to complete an assignment. A random selection of 36 students took an average of 22 minutes to complete the assignment. Assume that the time taken to complete the assignment satisfies a normal distribution with a = 8 minutes. Test the hypothesis that the mean time for completing the assignment is more than 20 minutes at 1% significance level. Step 1: Select the correct null and alternative hypothesis for the test and the value of a: A. HO: u = a, H1: pa H1: p <a H1: pa B. H0: μ = a, C. H0: u = a. ANSWER: The correct choice is Step 2: Select the correct critical values for the test and the value of b: A. Critical values are = b; Reject H0 if z> b or if z <-b B. Critical value is b; Reject H0 only if z> b C. Critical value is -b; Reject H0 only if z <-b ANSWER: The correct choice is Step 3: Calculate the test statistic The test statistic is Z= Step 4: Select the correct decision: A. HO can be rejected B. HO cannot be rejected and a = ANSWER: and b = A teacher believes that students will take 20 minutes to complete an assignment. A random selection of 36 students took an average of 22 minutes to complete the assignment. Assume that the time taken to complete the assignment satisfies a normal distribution with a = 8 minutes. Test the hypothesis that the mean time for completing the assignment is more than 20 minutes at 1% significance level. Step 1: Select the correct null and alternative hypothesis for the test and the value of a: A. HO: u = a, H1: pa H1: p <a H1: pa B. H0: μ = a, C. H0: u = a. ANSWER: The correct choice is Step 2: Select the correct critical values for the test and the value of b: A. Critical values are = b; Reject H0 if z> b or if z <-b B. Critical value is b; Reject H0 only if z> b C. Critical value is -b; Reject H0 only if z <-b ANSWER: The correct choice is Step 3: Calculate the test statistic The test statistic is Z= Step 4: Select the correct decision: A. HO can be rejected B. HO cannot be rejected and a = ANSWER: and b =