Of the following characteristics,the t-distribution and z-distribution are the same in all but one. Which one is it?
A)Continuous
B)Symmetrical
C)Bell-shaped
D)Mean = 0,and standard deviation = 1

Question

Quizplus · Accepted Answer

The t-distribution has a mean of 0, but its standard deviation is not always 1. It varies based on the sample size and degrees of freedom used to calculate it. The z-distribution always has a mean of 0 and a standard deviation of 1. Therefore, D is the only characteristic that is not the same for both distributions.

Of the Following Characteristics,the T-Distribution and Z-Distribution Are the Same