Sample Size Estimation with Odds Ratio

Enter Prevalence (Inputs in fractions) Enter Group 'A' events Proportion (Inputs in fractions) Enter Group 'B' events Proportion (Inputs in fractions) Enter Sampling Ratio Select Confidence Interval

80% 90% 95% 99%

Select Desired Power

80% 90% 95% 99%

Select one tailed or two tailed

1 tailed 2 tailed

Result

Sample Size Back to Index

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