Cálculo del tamaño muestral

\[ n = \left\{ \dfrac{\sigma (z_{1 - \beta} + z _{\alpha/2})}{\Delta} \right\}^2 \]

Donde

• \(\alpha\) es el error tipo I (\(0.05\) por defecto)
• \(\beta\) es la potencia (\(0.8\) por defecto)
• \(\Delta\) es el valor con el que se calcula el intervalo de confianza aceptable

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