The t Test Compared with a t test for independent groups, a t test for matched groups almost always
A)has a lower chance of Type 2 error.
B)has more degrees of freedom.
C)is more powerful.
D)has a lower chance of Type 2 error and is more powerful.

Question

Quizplus · Accepted Answer

A t test for matched groups (also called a paired-samples or dependent-samples t test) involves comparing the differences between two related groups, such as before and after measurements or treatment groups and control groups where each participant is in both groups. This results in a more precise comparison with less variability, therefore leading to a lower chance of Type 2 error and increased power compared to a t test for independent groups.

The T Test Compared with a T Test for Independent