Category Sin categoría

Analysis of logistic regression models Analysis of logistic regression models

Sin categoría, Statistics

The paradox of the air

The parameters that report on the quality of a multiple logistic regression model and that are usually provided by the statistical programs with which they are carried out are reviewed. Emphasis is placed on the goodness of fit, the predictive capacity and the statistical significance of the model.

Manuel Molina
09/25/2023

Sin categoría, Statistics

The mistery of the different colored socks

The parameters that report on the quality of a multiple linear regression model and that are usually provided by the statistical programs with which they are carried out are reviewed. Emphasis is placed on the goodness of fit, the predictive capacity and the statistical significance of the model.

Manuel Molina
07/25/2023

Sin categoría, Statistics

A pair of means

The sample size necessary to estimate the comparison of two means depends on the confidence level of the estimate, the power of the study, the variability of the measured variable and the magnitude of the difference that is to be detected.

Manuel Molina
08/30/2022

Sin categoría, Statistics

Sciences or arts

Mann-Whitney U test, also called Wilcoxon rank-sum test, is a non-parametric test that allows comparing the medians of a quantitative variable for the two categories of a dichotomous qualitative variable. It is applied when the assumptions necessary to use the Student's t-test cannot be fulfilled.

Manuel Molina
06/28/2022

Sin categoría, Statistics

The sleepless naturalist

Discrete probability distributions allow us to establish the full possible range of values of an event when it is described with a discrete random variable. Examples of the use of the Bernoulli, binomial, geometric, and hypergeometric distributions are shown.

Manuel Molina
05/24/2022