Sample size calculations for testing equivalence of two exponential distributions with right censoring allocation with costs

Jiin Huarng Guo, Wei Ming Luh

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The present study considered two independent exponential distributions with the hypothesis for testing equivalence of lifetime means or failure rates, and aimed to determine the required uncensored sample size based on power, sampling cost, and censoring proportion simultaneously in the case of right censoring. Approximate sample size formulas with an iterative procedure were proposed and an uncensored sample size allocation ratio was derived to minimize the total cost for a designated power or maximize statistical power for a limit cost. R codes are provided for easy application. The proposed methods are validated in terms of Type I errors and statistical power in a simulation study, and are recommended for the future use.

Original languageEnglish
Pages (from-to)144-156
Number of pages13
JournalMethodology
Volume13
Issue number4
DOIs
Publication statusPublished - 2017 Oct

All Science Journal Classification (ASJC) codes

  • Social Sciences(all)
  • Psychology(all)

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