Step 1

The t-distribution, also known as the Student’s t-distribution, is a type of continuous probability distribution which is used to estimate the population parameters when the sample size is small and/or when the population standard deviation is unknown.

It is similar to the normal distribution with its bell shape although it has heavier tails because it has greater chance for extreme values in the tails than normal distributions.

Step 2

The degrees of freedom is the number that determines each unique t-distribution. The shape of the t-distribution is defined by the degrees of freedom (df) that went into the estimation of the standard deviation.

The t-distribution, also known as the Student’s t-distribution, is a type of continuous probability distribution which is used to estimate the population parameters when the sample size is small and/or when the population standard deviation is unknown.

It is similar to the normal distribution with its bell shape although it has heavier tails because it has greater chance for extreme values in the tails than normal distributions.

Step 2

The degrees of freedom is the number that determines each unique t-distribution. The shape of the t-distribution is defined by the degrees of freedom (df) that went into the estimation of the standard deviation.