Exact confidence intervals following a group sequential test.

A. A. Tsiatis, G. L. Rosner, C. R. Mehta

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)797-803
Number of pages7
Issue number3
StatePublished - Sep 1984
Externally publishedYes

ASJC Scopus subject areas

  • Statistics and Probability
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)
  • Agricultural and Biological Sciences(all)
  • Applied Mathematics


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