Introduction to Fit Y by X
Examine Relationships between Two Variables
Use the Fit Y by X platform to analyze pairs of variables. You can do this using scatter plots, linear regression, ANOVA, multiple comparisons, logistic regression, contingency tables and much more. Specific analyses depend on the modeling types of the variables.
Fit Y by X launches one of four platforms:
• Use Bivariate to analyze a continuous Y and a continuous X
• Use One-way analysis, including ANOVA, to analyze a continuous Y and a categorical X
• Use Logistic regression to analyze a categorical Y and a continuous X
• Use Contingency to analyze a categorical Y and a categorical X
Figure 4.1 Examples of Four Types of Analyses
The Fit Y by X platform is a collection of four platforms (or types of analyses): Bivariate, Oneway, Logistic, and Contingency.
Specific Platform | Modeling Types | Description |
|---|---|---|
Bivariate | Continuous Y by continuous X | Analyzes the relationship between two continuous variables. See “Bivariate Analysis”. |
Oneway | Continuous Y by nominal or ordinal X | Analyzes how the distribution of a continuous Y variable differs across groups defined by a categorical X variable. See Oneway Analysis. |
Contingency | Nominal or ordinal Y by nominal or ordinal X | Analyzes the distribution of a categorical response variable Y as conditioned by the values of a categorical X factor. See Contingency Analysis. |
Logistic | Nominal or ordinal Y by continuous X | Fits the probabilities for response categories to a continuous X predictor. See Logistic Analysis. |