# What is the t-distribution?

Mar 25, 2015

t-distribution is also known as student's t-distribution .....

this is a probability distribution that is used to estimate the population parameter when the given sample space is small or when the variance is unknown .

this type of distribution has three types of properties and they are:

• mean distribution is equal to zero

• variance is equal to v/ (v-2) where the v is the degrees of freedom and v is always less than 2

- the variance is always greater than one. with infinite degrees of freedom the t-distribution is same as standard normal distribution.