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Basic Analysis and Graphing - SAS

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Chapter 5<br />

Performing Oneway <strong>Analysis</strong><br />

Using the Fit Y by X or Oneway Platform<br />

Using the Oneway or Fit Y by X platform, you can explore how the distribution of a continuous Y variable<br />

differs across groups defined by a single categorical X variable. For example, you might want to find out how<br />

different categories of the same type of drug (X) affect patient pain levels on a numbered scale (Y).<br />

The Oneway platform is the continuous by nominal or ordinal personality of the Fit Y by X platform. The<br />

analysis results appear in a plot, <strong>and</strong> you can interactively add additional analyses, such as the following:<br />

• a one-way analysis of variance to fit means <strong>and</strong> to test that they are equal<br />

• nonparametric tests<br />

• a test for homogeneity of variance<br />

• multiple-comparison tests on means, with means comparison circles<br />

• outlier box plots overlaid on each group<br />

• power details for the one-way layout<br />

Figure 5.1 Oneway <strong>Analysis</strong>

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