The Proportions Against a Specified Value test is used for large samples to test the hypothesis:
H0: the proportion is the same in both populations
H1: the proportion is [different to/greater than/less than] the specified value
The value of the Z statistic is calculated from:
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Where:
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proportion in the sample |
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specified value of the proportion |
n |
sample size |
The probability corresponding to Z0 can be found from tables.
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