11
Comparing Multiple Means: Analysis of Variance
Introduction
A student's T-test can be used to compare two samples. Often, it is necessary to compare more than two samples. Analysis of variance (ANOVA) is a powerful statistical analysis tool that can be used to compare the mean of three or more populations efficiently. An interesting fact to remember is that the analysis of variance actually compares the means. In ANOVA, variation is partitioned using the sum of squares. This statistical analysis tool is used to test hypotheses about differences between two or more means. The null hypothesis in ANOVA can be stated as:
Alternate hypothesis ...
Get Six Sigma for Business Excellence: Approach, Tools and Applications now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
