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| Newcombe (1998) suggests using alternatives to the usual Wald procedure to obtain confidence intervals for a proportion, particularly for proportions less than 0.2 or greater than 0.8. He suggests the exact binomial method and Wilson’s (1927) method provide slightly better coverage. Both of these may be computed at http://home.clara.net/sisa/onemean.htm __References__ Newcombe RG. (1998) Two sided confidence intervals for the single proportion: Comparison of seven methods. Statistics in Medicine 1998;17:857-872 Wilson EB (1927). J Am Stat Assoc 22, 209-212. |
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Confidence Interval for Binomial Proportions
Wald
Wilson Newcombe (1998) suggests using alternatives to the usual Wald procedure to obtain confidence intervals for a proportion, particularly for proportions less than 0.2 or greater than 0.8. He suggests the exact binomial method and Wilson’s (1927) method provide slightly better coverage. Both of these may be computed at http://home.clara.net/sisa/onemean.htm
References
Newcombe RG. (1998) Two sided confidence intervals for the single proportion: Comparison of seven methods. Statistics in Medicine 1998;17:857-872
Wilson EB (1927). J Am Stat Assoc 22, 209-212.
Spreadsheet
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