The Oneway ANOVA Form does calculations for Fixed and Random Effects Oneway ANOVAs, and the Kruskal-Wallis Nonparametric Oneway ANOVA for ordinal data. With the Fixed Effects model, omega-squared is calculated. With the Random Effects model, the between-component variance, total variance, and Intraclass Correlation coefficient are calculated.

When selected, three dispersion tests will be output: the Bartlett-Box-F, the Levene Test, and the ADM(n-1) procedure.

Where:

- J is the number of Groups
- n is the sample size per group

Where is the Omega-Squared value.

Where:

is the estimated Treatment Variance, and

is the Intraclass Correlation Coefficient.

The data are ranked, with corrections made for ties. The H statistic is calculated as follows. H' is the correction for ties. H is tested using a Chi-square distribution, with k-1 degrees of freedom.

Three dispersion tests are included in MVPstats.

- The ADM(n-1) test is a Oneway on the Absolute Deviations from the Sample Medians, with the center point omitted.
- The Levene test is a Oneway on the Absolute Deviations from the Means.
- The Bartlett-Box-F, which requires Normality, uses the following calculations.

Where F has (k-1, f2) degrees of freedom.

**File**provides the ability__Save__or Print the output, access the__Data Editor__, or return to the__Main Form__.**Edit**allows__Editing Output Text__by cutting, copying, pasting, and undoing entry.**View**provides the ability to enlarge/reduce the Form size for easier viewing.**Help**provides access to this Website.

These buttons provide quick access to the following tasks.

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Performs calculations and displays output.

The confidence level used in calculations may be entered here. The value is expressed in percent. The confidence level may be changed by selecting and typing in the level, or by using a drop-down selection.

Changes the number of decimal places, from 0 to 9. Change may be made by selecting and typing in the number, or by using the incrementing buttons.

The calculation output is displayed here when is clicked. You may save, print, edit, cut, copy, and paste text in this area.

Select the data column representing the Measures variable using the drop down selection.

Select the data column representing the Groups variable using the drop down selection.

Select the lowest group value to be included in the analysis here.

Select the highest group value to be included in the analysis here.

Select either a Fixed or Random effects analysis to be conducted.

Check this box to display dispersion tests.