The deception of intuition
Combinatory and probability. An example of the use of combinatory is presented to obtain the possible and total events to calculate the probability of that event.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Category Statistics
Meat or fish?
Mean or median? Mean and median are two measures of centralization. It is discussed in which situations it is preferable to use one or the other to describe data.
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.
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.