If the standard error is 12, the width of a quick prediction interval for Y is:
A)±15.
B)±24.
C)±19.
D)impossible to determine without an F table.

Question

Quizplus · Accepted Answer

A quick prediction interval for Y is generally calculated as 2 × SE(Y), where SE(Y) is the standard error of the Y estimate. Thus, a quick prediction interval for Y would be:
2 × SE(Y) = 2 × 12 = 24
Therefore, the width of the quick prediction interval for Y is ±24. Thus, the correct answer is B, ±24.

If the Standard Error Is 12, the Width of a Quick