Free Statistical Calculators

Statistical Calculators

Working in early phase oncology clinical trials as a biostatistician I come across some contexts where conventional software does not provide the necessary calculations. The calculations themselves can be worked out in a few hours to a day. However there is a need to dig out the appropriate reference, maybe pay for it, read and figure out the results and write code to calculate and check the results – all of which could take a little time and effort.

The pages in this section will have such calculators. I currently have calculators on early phase single sample clinical trials with a survival endpoint, on the Cochran-Armitage trend test, on conditional power calculations, on the sample size for logistic regression and on the influence of large strata or sites in clinical trials.

The BLUE and RED Estimators: BLUE is an acronym for Best Linear Unbiased Estimator. I Threw in a RED estimator!