Sample Size Determination
Paired Observations
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This utility can be used to calculate required sample size when your aim is to determine whether the row and column marginal frequencies with matched pairs of subjects, are equal(that is, whether there is "marginal homogeneity").
Formula used and other details
Proportion of pairs (amongst all pairs) with Condition 1 = +ve AND Condition 2 = -ve. [Out of 100]
Required
It is the expected proportion of pairs in your study with discordant results: +ve for first condition and -ve for second condtion.
Proportion of pairs (amongst all pairs) with Condition 1 = -ve AND Condition 2 = +ve. [Out of 100]
Required
It is the expected proportion of pairs in your study with discordant results: -ve for first condition and +ve for second condtion.
Confidence Level %
Enter positive number between 0.01 to 99.99
Required
In percentage. Commonly used values are 95, 99 and 90. Should be between 0.01 to 99.99.
Power ( 1 - β)
Enter positive number between 0.01 and 99.99
Required
In Percentage. Should be between 0.001 to 99.999. Common values are 80 % and 90 %
Sample Size Required =
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