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A categorical variable of K categories is usually entered in a regression analysis as a sequence of K-1 variables, e.g. as a sequence of K-1 dummy variables. Subsequently, the regression coefficients of these K -1 variables correspond to a set of linear hypotheses on the cell means. When coding categorical variables, there are a variety of coding systems we can choose for testing different set of
The following table shows general guidelines for choosing a statistical analysis. We emphasize that these are general guidelines and should not be construed as hard and fast rules. Usually your data could be analyzed in multiple ways, each of which could yield legitimate answers. The table below covers a number of common analyses and helps you choose among them based on the number of dependent var
FAQ: What are pseudo R-squareds? As a starting point, recall that a non-pseudo R-squared is a statistic generated in ordinary least squares (OLS) regression that is often used as a goodness-of-fit measure. In OLS, where N is the number of observations in the model, y is the dependent variable, y-bar is the mean of the y values, and y-hat is the value predicted by the model. The numerator of the r
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