When comparing the 90 percent prediction and confidence intervals for a given regression analysis:
A)the prediction interval is narrower than the confidence interval.
B)the prediction interval is wider than the confidence interval.
C)there is no difference between the size of the prediction and confidence intervals.
D)no generalization is possible about their comparative width.

Question

Quizplus · Accepted Answer

The prediction interval is wider than the confidence interval because it takes into account the uncertainty of individual predictions, whereas the confidence interval for the mean response is narrower as it is based on the average of all predicted values. Therefore, option B is correct.

When Comparing the 90 Percent Prediction and Confidence Intervals for a Given