The means for both Test A and Test B are 50. A 50% confidence interval for a score at the mean is 44-55 for Test A and 42-58 for Test B. Which of the following statements is true?
A) Test A is more reliable than Test B.
B) Test B is more reliable than Test A.
C) Test A has a larger SEM than Test B.
D) Test B has a larger SEM than Test A.

Question

Quizplus · Accepted Answer

Test B has a larger SEM than Test A because the confidence interval for Test B is wider than the confidence interval for Test A.

The Means for Both Test a and Test B Are