, Volume 14, Issue 3, pp 183–187 | Cite as

Further notes on differences between percentages

  • Frances Swineford


In certain problems dealing with percentage differences, it frequently happens that one is interested in a critical value different from zero rather than in the usual hypothesis of no population difference. Moreover, one may be concerned with differences greater than (or less than) a given magnitude, so that only one tail of the distribution of chance values is used. Tables are here presented to facilitate evaluating results of such problems. One per cent and 5 per cent values can be read from the tables, such values corresponding to the more usual 2 per cent and 10 per cent confidence limits.


Public Policy Statistical Theory Confidence Limit Percentage Difference Cent Confidence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Psychometric Society 1949

Authors and Affiliations

  • Frances Swineford
    • 1
  1. 1.Educational Testing ServiceUSA

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