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📸 Binomial Test menu path in SPSS
What Is the Binomial Test?
The binomial test determines whether the observed proportion of a binary variable significantly differs from a specified test proportion. Unlike chi-square goodness of fit (which handles multiple categories), the binomial test handles exactly two categories and is exact for small samples.
Example: Is a surgery's observed success rate (72%) consistent with the literature-reported benchmark of 70%?
Running the Binomial Test in SPSS
📸 Binomial test output — observed proportion vs. expected
APA Reporting
A binomial test indicated that the observed success rate (72%, n=58/80) did not significantly differ from the benchmark proportion of 70%, p=.823.
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