Complete the following steps to specify the data for the power and sample size calculation.
If you enter multiple values into a field, separate the values with a space. You can also use shorthand notation to indicate multiple values. For example, you can enter 10:40/5 to indicate sample sizes from 10 to 40 in increments of 5.
Comparison rates (R1): Enter one or more rates that are meaningfully different from the Baseline rate (R2). If you conduct a before/after analysis, enter the after rate here. Usually, the difference between the comparison rate and baseline rate is the smallest difference that has practical consequences for your application.