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A reader of a recent study by Warburton and Greeno is likely to form a gross misconception of the probability of forming very dissimilar groups when the randomization process is applied with small groups. This is due to a misapplication of elementary probability theory. The model they presented was, in part, justified by this erroneous approach. The other theoretical considerations motivating their analysis are not affected by this error.

Till i decuitnt hat been approved for public r«< leatt and salt; Ita dlttrlbutlon la unllilttd Reproduction in ihol«. or In part It perntted tor any purpott of the United Statti Govtrnaent,

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No abstract