The following MINITAB output presents a 95% confidence interval for the difference between two mean a. Is
Question:
a. Is this a left-tailed test, a right-tailed test, or a two-tailed test?
b. How many degrees of freedom did the calculator use?
c. What is the P-value?
d. Can you reject Ho at the a = 0.05 level?
Transcribed Image Text:
To-sample T for Populationi s Population2 180 N Mean StDev SE Mean Populationi 55 16.48435 10.23430 1.52564 Population2 47 18.32197 8.38450 1.22301 Difference = mu (Treatment 1)-mu (Treatment2) Estimate for difference:-1.83762 95% upper bound for difference: 2.22314 T-Test of difference = 0 (vs < 0): T-Value =-0.997 p-Value = 0.161 DF = 99
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