Suppose we select two independent random samples from populations having means 1 and 2. If 1, =
Question:
a. Calculate a 95 percent confidence interval for µ1 - µ2. Can we be 95 percent confident that µ2 is greater than µ1? By how much? Explain.
b. Test the null hypothesis H0: µ1 - µ2 = - 10 versus Ha: µ1 - µ2 < - 10 by setting α = .05. What do you conclude?
c. Test the null hypothesis H0: µ1 - µ2 = - 10 versus Ha: µ1 - µ2 ≠ - 10 by setting a equal to .01. What do you conclude?
d. Find the p-value for testing H0: µ1 - µ2 = -10 versus Ha: µ1 - µ2 ≠ -10. Use the p-value to test these hypotheses by setting a equal to .10, .05, .01, and .001.
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Related Book For 
Business Statistics In Practice
ISBN: 9780073401836
6th Edition
Authors: Bruce Bowerman, Richard O'Connell
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