Analysis of Variance

How To... > Work with Statistical Objects > Test Hypotheses > Analysis of Variance

When you want to test the hypothesis that the means for several groups are not equal to each other, you can perform a one-way analysis of variance (ANOVA). You can use this test only with raw data.

1.	Create a new test by dragging one from the shelf or by choosing Object \| New \| Hypothesis Test.

2.	From the test’s pop-up menu, choose Analysis of Variance.

3.	Drop attributes on the prompts at the top of the test.

An example is shown below. It appears that the mean incomes of the 13 races in a sample of 500 people in Alaska are similar enough that chance alone can explain their differences.

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To plot the F-distribution showing the p-value as a shaded proportion of the area under the curve, choose Test | Show Test Statistic Distribution.