ANOVA: Single Factor Tool

Use this tool to perform a single factor analysis of the variances of given variables. The variables are specified by the “Input Range:” entry. The given range can be grouped into the variables either by columns, by rows or by areas. The “Alpha:” entry specifies the significance level which is by default 5%.

If the first row or first column of the given range, or the first field of each area contains labels, select the “Labels ” option. The names of the variables will be included in the output table.

The results of this analysis of variance are presented in a standard ANOVA table. The “F critical” value is the largest value of F that is statistically significant using the given significance level (“Alpha”).

This tool also calculates the count, sum, average, and the variance of each variable.

Figure 8-4 1-factor ANOVA Dialog and Example Data

Example 8-1 Using the single factor ANOVA

See Figure 8-4 for an example of a completed dialog and Figure 8-5 for the corresponding output.

Figure 8-5 Output From a 1-factor ANOVA