Playing with powers
Centralization and dispersion. The measures of centralization and dispersion, arithmetic mean and standard deviation, as well as the calculation of kurtosis are described.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
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Give me a bar and I’ll move the earth
Standardization. Standardization is described, which consists of subtracting the mean from a value and dividing it by its standard deviation.
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Dispersion measures. Some dispersion measures are described, such as the interquartile range, the deciles and the percentiles.
Not all deviations are perverse
Dispersion measures. Dispersion measures such as variance and standard deviation are described, as well as their relationship with the confidence intervals.
Size does matter
Sample size. A series of considerations are made about the influence of sample size on the precision and probability of error of the study.