PsiStudent (df,…)

PsiStudent (df) is an unbounded distribution, symmetric about zero, with a shape similar to that of a Standard Normal distribution, and it approaches the Standard Normal distribution as the degrees of freedom (parameter df) increases.  It is also known as the t-distribution, or Student’s t-distribution.

The Student or t-distribution frequently arises when estimating the mean of a normally distributed population when the sample size is small. It is also used when the population variance is unknown, and is estimated from a small sample.

Alternate Formulation:  PsiStudentAlt

PsiStudentAlt is the PsiStudent distribution defined through alternative arguments.  One percentile parameter is required.

PsiStudent Distribution Parameters

PsiStudent Distribution Parameters