IMPORTANT: The One-Way ANOVA statistical test is only valid for comparison groups of 20 or less banner columns. |
The One-Way ANOVA statistical test performs an analysis of variance for a single row by a series of two or more columns. The row is the independent variable and the columns are the dependent variable. To make the comparisons between the columns, there are five multiple comparison range procedures that test the differences between each column:
The range tests are listed from least conservative to most conservative. A range test is considered conservative if it is less likely to find differences between groups of means. The Least-significant difference has no protection for multiple comparisons. This test achieves the same results as Independent T-Tests.
One-Way ANOVA tests are performed on columns of data within each specified WinCross Comparison Group. WinCross will assign a #1 to the first subset of data within each comparison group where no significant differences were found. Likewise, WinCross will assign a #2 to the next subset of data within the same comparison group where no significant differences were found. This process continues until all subsets of data have been examined for each comparison group.
A column of data can be a member of multiple subsets of data where no significant differences were found. In this case, you will see multiple One-Way ANOVA group indicators under that column of the banner on the mean row of your Wincross report. For example, #1#2#3 under a column of data indicates this value is a member of subset 1, subset 2 and subset 3 for that comparison group.
| Note: An asterisk (*) is displayed when a zero cell is encountered. You will need to change your groupings to exclude the zero cell. |
One-Way ANOVA options
Confidence level
Select the Confidence level for the chosen test. Choose between 90%, 95% or 99%.
Harmonic mean
Choose between Use the harmonic mean of the sizes of the two columns being compared for the sample size or Use the harmonic mean of all column sizes in the group for the sample size.
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