The number of units (persons, animals, patients, specified circumstances, etc.) in a population to be studied. The sample size should be big enough to have a high likelihood of detecting a true difference between two groups. (From Wassertheil-Smoller, biostatistics and epidemiology, 1990, p95)


a larger <b>sample size</b> is

a larger sample size is

<b>Sample Size</b> Determination

Sample Size Determination

with a one-sided test.

with a one-sided test.

<b>Sample Size</b>

Sample Size



<b>Sample size</b> Tables showing

Sample size Tables showing

The <b>sample size</b> calculation

The sample size calculation

Symptoms and diagnosis



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Last update: September 2014