Sample Size Calculator & Statistical Power Calculator
WEBUse this advanced sample size calculator to calculate the sample size required for a one-sample statistic, or for differences between two proportions or means (two independent samples). More than two groups supported for binomial data. Calculate power given sample size, alpha, and the minimum detectable effect (MDE, minimum effect of interest).
Power and Sample Size | Free Online Calculators
WEBFree, Online, Easy-to-Use Power and Sample Size Calculators. no java applets, plugins, registration, or downloads ... just free. Go Straight to the Calculators ».
Statistical power calculators
WEBThe power calculator computes the test power based on the sample size and draw an accurate power analysis chart. Larger sample size increases the statistical power. The test power is the probability to reject the null assumption, H 0, when it is not correct. Power = 1- β.
Post-hoc Power Calculator - ClinCalc
WEBThis calculator uses a variety of equations to calculate the statistical power of a study after the study has been conducted. 1 "Power" is the ability of a trial to detect a difference between two different groups.
Sample Size Calculator - ClinCalc
WEBThis calculator uses a number of different equations to determine the minimum number of subjects that need to be enrolled in a study in order to have sufficient statistical power to detect a treatment effect. 1. Before a study is conducted, investigators need to determine how many subjects should be included.
Power/Sample Size Calculator - University of British Columbia
WEBChoose which calculation you desire, enter the relevant population values for mu1 (mean of population 1), mu2 (mean of population 2), and sigma (common standard deviation) and, if calculating power, a sample size (assumed the same for each sample).
Universität Düsseldorf: G*Power
WEBG*Power is a tool to compute statistical power analyses for many different t tests, F tests, χ2 tests, z tests and some exact tests. G*Power can also be used to compute effect sizes and to display graphically the results of power analyses.
Statistical Power Calculator using the t-distribution*
WEBInteractive calculator for illustrating power of a statistical hypothesis test.
Power/Sample Size Calculator - University of British Columbia
WEBChoose which calculation you desire, enter the relevant values (as decimal fractions) for p0 (known value) and p1 (proportion in the population to be sampled) and, if calculating power, a sample size.
Power Calculator - Statsig
WEBCalculate sample size of a certain power for your experiments. Baseline Conversion Rate (%) Minimum Detectable Effect (%) Hypothesis. One-sided Test (Recommended) Used to determine if the test variation is better than the control (Recommended) Two-sided Test.
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