Prevalence Formula For Sample Size. An alternative approach of calculating the sample size is effect size. Replace z α by z α 2 for a two-sided test.
And for this example n can be calculated as. Thus we should determine the confidence intervals so that all the values of the sample lie within that interval range. Z Z statistic for a level of confidence of 95 196 P expected prevalence 105 d precision.
Assumption of the table.
Dr Azmi Mohd Tamil 2012 Table - Krejcie RV. Z Z statistic for a level of confidence of 95 196 P expected prevalence 105 d precision. Thus we should determine the confidence intervals so that all the values of the sample lie within that interval range. A sample of size n16448 will ensure that a 95 confidence interval estimate of the prevalence of breast cancer is within 010 or to within 10 women per 10000 of its true value.
