Suppose Instead of Comparing Independent Measurements Taken from Two Groups

question 36

Multiple Choice

Suppose instead of comparing independent measurements taken from two groups, you used a matched-pairs experiment and one treatment is randomly assigned to each half of the pair.In this case, how should you compute the confidence interval for the difference?

• A)Do it the same way you would do it for two independent groups.You'll just get more accurate results because they came from matched pairs.
• B)Do a separate confidence interval for each half of the pair and subtract the confidence intervals to get a range of differences.
• C)Compute the differences for each pair, treat them as a single data set, and use the formula for a confidence interval for one mean (the mean difference).
• D)None of the above.

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