Note: The Sample Size/Power platform is a feature available up to JMP 17. Starting with JMP 18, it has been replaced by the Sample Size Explorer.
[JMP 7 and below]
The baseline percentage in JMP is defined as the average of two percentages: p1 and p2. The baseline percentage in JMP is defined as (p1 + p2)/2.
[JMP 8 and above]
In JMP 8 and later, the format has been changed to allow you to directly enter two proportions. Enter the null hypothesis proportions P1 and P2 in "Proportion 1" and "Proportion 2," respectively, and Δ0 in "Hypothesized Difference." If the null hypothesis is P1=P2, enter 0 for the hypothesized difference.

FAQ # 2113