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(Step-by-Step) Use the paired t-interval procedure to obtain the required confidence interval. You may presume that the assumptions for using the procedure

Question: Use the paired t-interval procedure to obtain the required confidence interval. You may presume that the assumptions for using the procedure are satisfied. Ten different families are tested for the number of gallons of water a day they use before and after viewing a conservation video. The results are shown below.

Determine a \(90 \%\) confidence interval for the mean difference in numbers of gallons of water used per day before and after viewing the video.

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