Scientific Research Support
We can provide assistance with the various aspects involved in conducting a research project and help students successfully complete their thesis
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Tolerance = ,000 limit reached
Error message with multiple regressions in spss I regularly get questions related to an error message when performing multiple regression analyses in spss: Tolerance = ,000 limit reached. In this post I will explain what this message means, what the consequences are for the results of the analysis and how you can overcome the problem. Cause of error message
Mean centering
When performing statistical analyses, you sometimes encounter a situation where variables can be better centered around their mean. For example, in a regression analysis testing a moderation effect, but mean centering is also often used in multilevel analyses. What is mean centering? Mean centering is a so-called “linear transformation” of a variable. If we compare the histogram of
Linearity
Many statistical analyses we use are based on the assumption of linearity; There is a linear relationship between the dependent and independent variable(s). The reason for this is actually quite simple; if there is a linear relationship, we can use one parameter to represent the relationship because the slope of the (regression) line is the same everywhere. If there is no
Homoscedasticity
The assumption of homoscedasticity Homoscedasticity is an assumption for various statistical analyses, such as multiple regression. It is a difficult word to pronounce and actually one of the most difficult assumptions to check. Homoscedasticity has to do with residuals, also called error terms. To get a better understanding of the assumption of homoscedasticity, I'll start with an explanation
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