Unformatted text preview: Question 3. Find the 95% confidence interval for the difference in mean monthly online expenditures between males and females.
5.19 . lower bound of confidence interval (use 2 decimal places in your answer).
upper bound of confidence interval (use 2 decimal places in your answer).
Question 4. The results in questions 1 and 3 seem contradictory. Which method is correct: doing two-sample inference as in question 3, or doing one-sample inference twice as in question 1?
. Two-sample inference; that is, calculate one confidence interval for the difference between the means as in Question 3.
O One-sample inference twice; that is, calculate a confidence interval for each individual mean as in Question 1....
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- Spring '09