Category Sin categoría

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

Science behind the magic

A neural network consists of a series of layers of processing units, called neurons, that perform transformations on input data to generate output data. The fundamentals of the internal functioning of an artificial neural network are described.

Manuel Molina
05/30/2023

Sin categoría, Statistics

Hasta la vista, baby

Artificial intelligence is the simulation of human intelligence in machines programmed to think and learn like humans so that they can automate tasks that are normally performed by humans. Machine learning develops and applies models and algorithms that are capable of learning from data.

Manuel Molina
02/28/2023

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