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Biometrics. 1984 Sep;40(3):797-803.

Exact confidence intervals following a group sequential test.

Abstract

A numerical method is used to compute confidence intervals, which have exact coverage probabilities, for the mean of a normal distribution following a group sequential test. This method, which uses an ordering of the sample space similar to that employed by Siegmund (1978, Biometrika 65, 341-349), is contrasted with the usual confidence interval for the mean.

PMID:
6518248
[PubMed - indexed for MEDLINE]
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