Tag Sample size

Comparison of two means Comparison of two means

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

A measure with a pedegree

The sample size required to estimate a population mean depends on the desired level of confidence and precision, in addition on the variable’s variance in the population.

Manuel Molina
01/11/2022

Sin categoría

If you doubt, better in the middle

The sample size required to estimate a population proportion depends on the desired level of confidence and precision, in addition on the value of the proportion in the population

Manuel Molina
12/07/2021

Statistics

A strenuous effort, though unnecessary

Factors that condition the sample size. The need to perform a correct calculation of the sample size necessary for a study is reviewed, as well as the main factors that influence the sample required to demonstrate the effect considered relevant…

Manuel Molina
05/04/2021

Tamaño muestral en estudios de supervivencia

Statistics

By your actions they will judge you

Sample size in survival studies. When calculating the sample size in survival studies, the determining factor is not the difference in an effect measure between the two groups, but the number of events expected in each of them. The calculation…

Manuel Molina
07/21/2020