What happens to the power of a t-test when the variability of the raw scores is increased? The power will
A)increase.
B)decrease.
C)remain the same.
D)increase or decrease,depending on whether is positive or negative.

Question

What happens to the power of a t-test when the variability of the raw scores is increased? The power will
A)increase. 
B)decrease. 
C)remain the same. 
D)increase or decrease,depending on whether is positive or negative.

Quizplus · Accepted Answer

When the variability of the raw scores is increased, the power of a t-test will decrease. This is because increased variability leads to a wider spread of scores, which can make it more difficult to detect a significant difference between groups. As a result, the t-value will be smaller, and the probability of a Type II error (incorrectly failing to reject the null hypothesis) will be higher.

What Happens to the Power of a T-Test When the Variability