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Pearson’s r
Pearson’s r is a special case of slope in which both the outcome and explanatory variables are transformed into z scores prior to analysis; also known as the correlation coefficient.
cohensD()
The cohensD() function calculates the Cohen's d measure of effect size. Example: cohensD(Thumb ~ Gender , data = Fingers) Example output:
Type I and Type II Error
Type I and II Error describe the possible errors we might make when drawing conclusions about the DGP based on our data. Type I error is when we should adopt the empty model but we adopt the complex model in error. Type II error is when we should ...
Variables
A variable is a measurable characteristic or attribute that can take on different values across cases (i.e., observational units such as people, companies, or time points). Types of Variables Variables can be classified by the type of values they ...
Statistical Model
A statistical model is a simplified way of describing how data are generated. It helps us separate what we can explain using known information from what we cannot explain perfectly. We use statistical models for three main purposes: (1) to understand ...