View statisticsdocx from STATISTICS 95 at San Jose State University. In order to estimate the sample size we need approximate values of p 1 and p 2. MOE z p 1 - p n 2.
In statistics the formula E t can be used to calculate a margin of error.
MOE z p 1 - p n 2. Sample Size. The formula appears in M. Here are the steps for calculating the margin of error for a sample proportion.