Which of the following is true about Student's t-models?
I. They are unimodal, symmetric, and bell-shaped.
II. They have fatter tails than the Normal model.
III. As the degrees of freedom increase, the t-models look more and more like the Normal.
A) I and II
B) I, II, and III
C) II and III
D) I only
E) I and III

Question

Quizplus · Accepted Answer

Student's t-models are indeed unimodal, symmetric, and bell-shaped (I). They have fatter tails than the Normal model, which means they are more prone to producing values that fall far from the mean (II). As the degrees of freedom increase, the t-models converge to the Normal distribution (III).

Which of the Following Is True About Student's T-Models