Researchers from Northwestern University, University of Pennsylvania, and University of Colorado published a new Journal of Marketing study that proposes abandoning null hypothesis significance ...

It may be common knowledge that p < .05 indicates statistical significance. Psychology students (and others) are often taught that p < .05 means the probability (p) of rejecting the null hypothesis ...

Read on to learn more about what a t-test is, the different formulas used, and when to apply each type to compare means and ...

Calculations of power are presented for sequential procedures consisting of repeated significance tests. Binomial and normally distributed variables are considered ...