Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/113341
Title: A SAS procedure for exact probability testing of difference between sample and population proportion
Authors: Lee, J.
Lee, H.-P. 
Fong, N.-P. 
Keywords: Exact probability test
Inference on population proportion
SAS program
Significance test
Issue Date: 1989
Citation: Lee, J.,Lee, H.-P.,Fong, N.-P. (1989). A SAS procedure for exact probability testing of difference between sample and population proportion. Computers in Biology and Medicine 19 (2) : 137-143. ScholarBank@NUS Repository.
Abstract: Statistical testing of the hypothesis that the proportion of subjects in a defined population having a certain attribute (proportion of "positives" in a population, P) is equal to some specified value (P0) is frequently encountered in biomedical research. For example, a study might be carried out to statistically test whether the postoperative wound infection rate in patients having undergone an operation with a "new" surgical procedure is 20%, the same value that has been observed for the "established" surgical procedure. The significance test for this hypothesis (e.g., test H0: P = 0.20 against HA: P ≠ 0.20) is usually based on the normal theory approximation method. However, when the sample size is "small", especially if P0 is close to 0 or 1, the normal theory method can yield grossly unreliable results. In contrast, the significance test based on the exact binomial probability procedure always yields reliable results. A computer program coded in SAS is described herein to perform this exact probability test procedure. © 1989.
Source Title: Computers in Biology and Medicine
URI: http://scholarbank.nus.edu.sg/handle/10635/113341
ISSN: 00104825
Appears in Collections:Staff Publications

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