<P> Statistical power may depend on a number of factors . Some factors may be particular to a specific testing situation, but at a minimum, power nearly always depends on the following three factors: </P> <Ul> <Li> the statistical significance criterion used in the test </Li> <Li> the magnitude of the effect of interest in the population </Li> <Li> the sample size used to detect the effect </Li> </Ul> <Li> the statistical significance criterion used in the test </Li> <Li> the magnitude of the effect of interest in the population </Li>

The easiest method of increasing power in a study is to increase sample size