On Comparing Treatment Effects to a Standard when the Variances are Unknown and Unequal

Rand R. Wilcox

Journal of Educational and Behavioral Statistics, 1985, vol. 10, issue 1, 45-54

Abstract: Let δ = μ e – μ c be the difference between the means of an experimental and control group, and suppose it is desired to determine whether δ ≥ δ 0 , where δ 0 is a known constant specified by the experimenter. In this paper, I describe how to determine whether enough observations have been sampled to be reasonably certain that a correct decision will be made about how δ compares to δ 0 . The solution is exact regardless of what the variances might be. In particular, equal variances are not assumed.

Keywords: Two-Stage procedures; ranking and selection (search for similar items in EconPapers)
Date: 1985
References: Add references at CitEc
Citations:

Downloads: (external link)
https://journals.sagepub.com/doi/10.3102/10769986010001045 (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:sae:jedbes:v:10:y:1985:i:1:p:45-54

DOI: 10.3102/10769986010001045

Access Statistics for this article

More articles in Journal of Educational and Behavioral Statistics
Bibliographic data for series maintained by SAGE Publications ().