Statistics applied to health research

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Comparison of the averages of two independent samples (with variances unknown but assumed equal)

Comparación de los promedios de dos muestras independientes (con varianzas desconocidas pero supuestas iguales)

Abstract

In this article we discuss and show examples of how to compare the means of two independent samples (with unknown variances assumed to be the same), how to compare two samples with paired observations, and how to compare the percentages of two samples. By recurring to hypothetical situations and simulated data, we show the steps involved in these situations.