The widest confidence interval for an average value of y based on a value of x will occur at the average value for x.

Question

Quizplus · Accepted Answer

The widest confidence interval for an average value of y based on a value of x typically occurs at the extremes of the values of x, not at the average value of x. This is because the prediction error increases as we move away from the center of the data (the average value of x).

The Widest Confidence Interval for an Average Value of Y