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.

Question

Quizplus · Accepted Answer

When using a matched-pairs experiment, the differences between each pair should be calculated and treated as a single data set. This mean difference can then be used to calculate a confidence interval using the appropriate formula. Option A is incorrect, as the fact that the measurements were taken in pairs affects the way in which the confidence interval is calculated. Option B is also incorrect, as it implies that each half of the pair can be treated as an independent data set, which is not appropriate.

Suppose Instead of Comparing Independent Measurements Taken from Two Groups