The value of the standard deviation of the T distribution is equal to
A) the standard deviation of z
B) the standard deviation of the raw score distribution
C) the standard deviation of the raw score distribution, divided by 10
D) 10

Question

Quizplus · Accepted Answer

The standard deviation of the T distribution is always equal to 1, regardless of the sample size. This means that the T distribution has a wider spread than the standard normal distribution (z distribution) which has a standard deviation of 1. Therefore, the correct answer is D which represents the value of 10 that is always used in the calculation of T-scores for confidence intervals and hypothesis testing.

The Value of the Standard Deviation of the T Distribution