Power and Sample Size Calculators

Documentation

Test 1 Mean

1-Sample, 2-Sided Equality

1-Sample, 1-Sided

1-Sample Non-Inferiority or Superiority

1-Sample Equivalence

Compare 2 Means

2-Sample, 2-Sided Equality

2-Sample, 1-Sided

2-Sample Non-Inferiority or Superiority

2-Sample Equivalence

Compare k Means

1-Way ANOVA Pairwise, 2-Sided Equality

1-Way ANOVA Pairwise, 1-Sided

Test 1 Proportion

1-Sample, 2-Sided Equality

1-Sample, 1-Sided

1-Sample Non-Inferiority or Superiority

1-Sample Equivalence

Compare 2 Proportions

2-Sample, 2-Sided Equality

2-Sample, 1-Sided

2-Sample Non-Inferiority or Superiority

2-Sample Equivalence

Compare Paired Proportions

McNemar's Z-test, 2-Sided Equality

McNemar's Z-test, 1-Sided

Compare k Proportions

1-Way ANOVA Pairwise

Test Time-To-Event Data

Cox PH, 2-Sided Equality

Cox PH 1-Sided, non-inferiority, or superiority

Cox PH, Equivalence

Test Odds Ratio

Equality

Non-Inferiority or Superiority

Equivalence

Test Relative Incidence in Self Controlled Case Series Studies

SCCS, Alt-2

Other

1-Sample Normal

1-Sample Binomial

References

These are the 5 literature citations used as references for our calculators:

Chow S, Shao J, Wang H. 2008. Sample Size Calculations in Clinical Research. 2nd Ed. Chapman & Hall/CRC Biostatistics Series.

Connor R. J. 1987. Sample size for testing differences in proportions for the paired-sample design. Biometrics 43(1):207-211.

Farrington CP. 1995. Relative incidence estimation from case series for vaccine safety evaluation. Biometrics 51:228-235.

Musonda, P, CP Farrington, HJ Whitaker. 2006. Sample sizes for self-controlled case series studies. Statistics in Medicine 25:2618-2631.

Rosner B. 2010. Fundamentals of Biostatistics. 7th Ed. Brooks/Cole.

Overview of Power and Sample Size .com Calculators

References

Overview of Power `and` Sample Size `.com` Calculators