Which of the following is a similarity of the t-distribution and the standard normal distribution?

A) There is only one distribution for each.
B) Both distributions are symmetrical.
C) Both distributions are asymmetrical.
D) Both distributions are a function of the sample size.

T-distribution

A probability distribution used in statistics that arises when estimating the mean of a normally distributed population in situations where the sample size is small and the population standard deviation is unknown.

Standard Normal Distribution

Normal distribution measured in standard deviation units with a mean equal to 0 and a standard deviation equal to 1.