Interpret computer output The following output from MINITAB presents a confidence interval for the mean difference between matched pairs a Is this a left tailed test, a right tailed test, or a two tailed test b How many degrees of freedom are there c What is the P value d Can you reject H0 at the 0 05 level Paired T Test and CI Before, After Paired T for Before After N Mean StDev SE Mean Before 12 20 50337 9 69467 2 79861 After 12 17 82398 6 36154 1 83642 Difference 12 2 67399 3 09085 0 89225 95 confidence interval for mean difference (0 71016, 4 63782) T Test of mean difference 0 (vs ne 0) T Value 3 00 P Value 0 012

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Question: Interpret computer output: The following output from MINITAB presents a confidence interval for the mean difference between matched pairs. a. Is this a left-tailed test,

Interpret computer output: The following output from MINITAB presents a confidence interval for the mean difference between matched pairs. Paired T-Test and CI: Before, After Paired T for Before - After

a. Is this a left-tailed test, a right-tailed test, or a two-tailed test?

b. How many degrees of freedom are there?

c. What is the P-value?

d. Can you reject H0 at the α = 0.05 level?

Paired T-Test and CI: Before, After Paired T for Before - After N Mean StDev SE Mean Before 12 20.50337 9.69467 2.79861 After 12 17.82398 6.36154 1.83642 Difference 12 2.67399 3.09085 0.89225 95% confidence interval for mean difference: (0.71016, 4.63782) T-Test of mean difference = 0 (vs ne 0): T-Value = 3.00 P-Value = 0.012

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