Select Sampling Method ... Sample Size Proportion Sample Size Mean Sample Size Power Sample Size Case Control Sample Size Random Clinical Trial Select sample size calculation method

Estimated Proportion:

Confidence Level:

Margin of Error:

Design Effect:

Number of Groups:

Equal Allocation Yes No

Response Rate

Known Population Size

Population Size

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Estimated standard deviation

Confidence level

Margin of error

Design effect

Number of groups

Should each group have equal sample size? Yes No

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Estimated standard deviation

Minimum effect size to detect

Significance level

Desired power

Design effect

Number of groups

Equal Allocation Yes No

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Proportion of exposed individuals among the controls

Expected odds ratio

Significance level

Desired power

Ratio of controls to cases

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Expected Difference Between Treatment and Control (Effect Size)

Estimated Standard Deviation

Significance Level

Desired Power

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