the ratio = within-subject variance of treatment T / within-subject variance of treatment R
Ho: the ratio \( \ge \delta \) or the ratio \( \le \frac{1}{\delta}\)
Ha: \( \le \frac{1}{\delta}\) < the ratio < \( \delta\)
ISV.Equivalence(alpha, beta, sigma1, sigma2, m, margin)significance level
power = 1-beta
within-subject variance of treatment 1
within-subject variance of treatment 2
for each subject, there are m replicates.
margin=delta, the true ratio of sigma1/sigma2
Chow SC, Shao J, Wang H. Sample Size Calculation in Clinical Research. New York: Marcel Dekker, 2003