In general one is less confident in predictions of Y when the value of X used for the prediction is outside the range of the original data used to construct the regression line.

Question

Quizplus · Accepted Answer

This is true because the regression line is only valid within the range of the original data used to construct it, and outside of that range, the relationship between X and Y may change, leading to less accurate predictions.

In General One Is Less Confident in Predictions of Y