Statistics How To

Statistics How To

Wording Bias

Bias > Wording bias, also called question-wording bias or “leading on the reader” (Gerver & Sgroi, 2017) happens in a survey when the wording of a question systematically influences the responses (Hinders, 2019). Examples of Wording Bias If a survey…

Pooled Variance

Statistics Definitions > Pooled variance (also called combined, composite, or overall variance) is a way to estimate common variance when you believe that different populations have the same variances. The pooled sample variance formula is: Where: n = the sample…

Pruning

Statistics Definitions > Pruning removes parts of a model that are non-predictive. The process discards statistical noise, reducing the model’s size and usually improving its accuracy. Pruning is often necessary because the number of potential subtrees grows as a function…