Book Image

Minitab Cookbook

By : Isaac A Newton
Book Image

Minitab Cookbook

By: Isaac A Newton

Overview of this book

Table of Contents (19 chapters)
Minitab Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

The repeated measures ANOVA – using a mixed effects model


These studies use repeated measurements on a subject. Typically, they are used to assess the change over time, or the same observation under different conditions. In this recipe, the results of a blind wine tasting are studied. Three types of wine are tested by three judges; a third factor is included for the type of glass the wine is being tested in. The score is accumulated across several responses and the maximum score is 40.

We will stack the data first before using the general linear model to study the effect of Judge, Wine, and Glass type on the score. The Judge factor can be considered a random factor in the design. Wine and Glass become our fixed factors.

We will use a decision level of 0.05 for the p-value.

Getting ready

Type the data into Minitab from the following screenshot:

How to do it…

The following steps will stack the data in one column before using the general linear model. We then reduce the model by removing the terms...