However, there are drawbacks to normal probability and it can be difficult to determine whether or not a sample truly follows a normal distribution.

A probability distribution, usually displayed graphically, shows the relative likelihood of all possible outcomes occurring within a specific time period.

A t-distribution is a type of probability function that is used for estimating population parameters for small sample sizes or unknown variances.

Properties of P-P and Q-Q probability plots for visually assessing the fit of probability models are reviewed. It is shown how to construct families of curves for standardized P-P plots, which are ...