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Proportions against a Specified Value

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:

Where:

 proportion in the sample specified value of the proportion n sample size

The probability corresponding to Z0 can be found from tables.

 Analytical and descriptive statistics are covered in the MiC Quality online course Primer in Statistics. Try out our courses by taking the first module of the Primer in Statistics free of charge.
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