Expanded confidence intervals, onesided tests, and equivalence testing
- 1 January 1992
- journal article
- review article
- Published by Taylor & Francis in Journal of Biopharmaceutical Statistics
- Vol. 2 (2) , 181-188
- https://doi.org/10.1080/10543409208835038
Abstract
An argument, based on expanded confidence intervals, is given for always performing one-sided tests. However, if goals are not one-sided and “follow-up” inferences are required, then the usual two-sided confidence intervals (corresponding to two-sided tests) are generally appropriate. When equivalence testing is required (the goal being to show that treatments are “not too different”), expanded confidence intervals are more efficient than Westlake's symmetrical confidence intervals.Keywords
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