This article describes completely randomized designs that have one primary factor.
The experiment compares the values of a response variable based on the different levels of that primary factor.
denotes factorial) possible run sequences (or ways to order the experimental trials).
= 369,600 ways to run the experiment, all equally likely to be picked by a randomization procedure.
Statistical tests for levels of X1 are those used for a one-way ANOVA and are detailed in the article on analysis of variance.
This article incorporates public domain material from the National Institute of Standards and Technology