Size and power
Power and sample size. Power and sample size are two related concepts, which have to do with the ability to detect the studied effect.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Category Statistics
Do not gamble
Binomial probability. Binomial probability allows us to show that if we play roulette, except on rare occasions with luck, the bank always wins.
Residuals management
Residuals. The calculation of the residuals of a contingency table is shown, using the observed and expected values.
The poor relations
Prediction intervals. Other intervals less known than the confidence interval are described, such as the prediction intervals and the tolerance intervals.
Even non-significant Ps have a little soul
Clinical relevance. We describe how the clinical relevance of the results of a study should be assessed, without being limited only to their statistical significance.