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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 ~ Sex , 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 ...
degrees of freedom (df)
Degrees of freedom (df) is the number of independent pieces of information that went into calculating the estimate. We find it’s helpful to think about degrees of freedom as a budget. The more data (represented by n) you have, the more degrees of ...
Statement on Sex and Gender
Many people use sex and gender interchangeably, but in truth, they’re distinct concepts. Sex is a classification based on biological characteristics, including DNA and anatomy. Gender refers to the socially constructed roles, behaviors, ...