A confidence interval for the ratio of treatment variances in a two-by-two crossover study.
The distance between two variances is usually measured using the ratio, and a confidence interval for this ratio can be used to measure its magnitude. For a two-by-two crossover study, special considerations must be made because the observations for any subject are correlated. Here a confidence interval for the ratio of the treatment variances in a two-by-two crossover study is presented.
Bristol
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Janssen Research Foundation Inc., Piscataway, New Jersey 08855.
D000704:Analysis of Variance; D002986:Clinical Trials as Topic / Q000379:methods / Q000706:statistics & numerical data*; D016001:Confidence Intervals; D004358:Drug Therapy / Q000706:statistics & numerical data*; D006801:Humans; D012107:Research Design / Q000706:statistics & numerical data