Which statement correctly compares t-distributions to the Normal distribution?
I. t distributions are also mound shaped and symmetric.
II. t distributions are more spread out than the normal distribution.
III. As degrees of freedom increase, the variance of t distributions becomes larger.
A) I and III only
B) I and II only
C) II only
D) I, II, and III
E) I only

Question

Quizplus · Accepted Answer

t-distributions are mound-shaped and symmetric like the normal distribution, and they are more spread out, especially with fewer degrees of freedom. As degrees of freedom increase, the t-distribution approaches the normal distribution, and its variance decreases, not increases.

Which Statement Correctly Compares T-Distributions to the Normal Distribution