Abstract
Suppose we have k normal populations with means μ1, …, μk and common variance σ2 (known or unknown). The ordered values of μi are denoted by .Lam(1986) obtained confidence intervals for all pairwise comparison of the ranked parameters for i ≠ j. This paper deals with the multiple comparison of specific pairs of ranked parameters. In particular, upper as well as lower confidence bounds for are derived. The results are applied to obtain a confidence interval for the true achieved probability of correct selection under the indifference-zone approach of Bechhofer (1954) and the subset selection approach of Gupta (1965).

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