Calculate Sample Size Needed. The margin of error is. Click on the Calculate.
Before a study is conducted investigators need to determine how many subjects should be included. 5 margin of error. Typically if there are H such sub-samples from H different strata then each of them will have a sample size nh h 1 2 H.
This calculator uses a number of different equations to determine the minimum number of subjects that need to be enrolled in a study in order to have sufficient statistical power to detect a treatment effect.
These nh must conform to the rule that n1 n2. The margin of error is. Input the proportion of the total population If required specify the population size. Click on the Calculate.
