The same old story
Hypothesis contrast. The steps of hypothesis contrast are reviewed: null and alternative hypotheses, choice of statistic, calculation of the p-value and decision.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Category Sin categoría
Some comparisons are not odious
Theoretical quantiles graph. The theoretical quantiles graph (q-q plot), used to check the normality of the data of a distribution, is reviewed.
The error of confidence
Mean’s confidence interval. Obtaining a mean, the concept of standard error and the calculation of the mean’s confidence interval are described.
Brown or blond, all bald
Comparisson of variables. We describe the statistical tests that should be used for comparisson of variables of different kinds.
The oddities of small towns
Law of small numbers. The law of small numbers, applying binomial probability, explains the occurrence of Bernouilli events in small samples. I remember when I was a child and went to school that almost everyone had a village to go…