PROPORTIONS: Two independent proportions

PROPORTIONS: Observed versus a reference proportion

PROPORTIONS: Paired measurements(repeated in one group)

PROPORTIONS: Bioequivalence

PROPORTIONS: Population Estimate

PROPORTIONS: Odds Ratio (Case-Control studies)

PROPORTIONS: Relative Risk (Cohort studies)

PROPORTIONS: Power Calculation

PROPORTIONS: Two independent proportions by cluster

MEANS: Two independent means

MEANS: Two paired means (repeated in one group)

MEANS: Observed versus a reference mean

MEANS: Repeated measurements

MEANS: Population Estimate

MEANS: One-Way Analysis of Variance

MEANS: Power Calculation

OTHER: Survival analysis(Log-rank Test)

OTHER: Correlation coefficient

OTHER: Kappa for a binary outcome

OTHER: Intraclass correlation coefficient

Alpha Risk
Test
Beta Risk
Confidence level
Group 1 proportion (Enter values 0 to 1)
Group 2 proportion (Enter values 0 to 1)
Group 2 size/Group 1 size ratio
Drop-out rate (Enter values 0 to 1)
Null hypothesis proportion (Enter values 0 to 1)
Minimum expected difference (Enter values > 0)
Drop-out rate (Enter values 0 to 1)
Proportion in first assessment (Enter values 0 to 1)
Proportion in second assessment (Enter values 0 to 1)
Drop-out rate (Enter values 0 to 1)
Proportion of reference (Enter values 0 to 1)
Minimum expected difference (Enter values 0 to 1)
Drop-out rate (Enter values 0 to 1)
Reference population size
Expected proportion (Enter values 0 to 1)
Desired precision of confidence level (Enter values 0 to 1)
Item substitution rate (Enter values 0 to 1)
Proportion of exposed in controls (Enter values 0 to 1)
Minimum expected Odds Ratio (Enter values > 0)
Number Controls/Number Cases Ratio
Drop-out rate (Enter values 0 to 1)
Event rate in Non-Exposed (Enter values 0 to 1)
Minimum expected relative risk (Enter values > 0)
Non-Exposed/Exposed ratio
Drop-out rate (Enter values 0 to 1)
Group 1 proportion (Enter values 0 to 1)
Group 2 proportion (Enter values 0 to 1)
Group 1 sample size
Group 2 sample size
Expected number of participants per cluster
Minimum expected difference (Enter values > 0)
Population prevalence (Enter values > 0)
Standard deviation within clusters (Enter values > 0)
Standard deviation between clusters (Enter values > 0)
Drop-out rate (Enter values 0 to 1)
Group 1 size/Group 2 size ratio
Common standard deviation (Enter values > 0)
Minimum expected difference (Enter values > 0)
Drop-out rate (Enter values 0 to 1)
For this calculation the standard deviation of differences is needed, is it known?

Estimated standard deviation of differences (Enter values > 0)
Standard deviation of the first measure (Enter values > 0)
Standard deviation of the second measure (Enter values > 0)
Correlation between measures, first group compared to second group
Minimum meaningful difference (Enter values > 0)
Drop-out rate
Common standard deviation (Enter values > 0)
Minimum expected difference (Enter values > 0)
Drop-out rate (Enter values 0 to 1)
Common standard deviation (Enter values > 0)
Mean difference between groups (Enter values > 0)
Drop-out rate (Enter values 0 to 1)
Correlation between first and second measurements
Group 1 size/Group 2 size ratio (Enter values > 0)
Reference population size
Estimated standard deviation (Enter values > 0)
Desired precision of confidence level (Enter values 0 to 1)
Item substitution rate (Enter values 0 to 1)
Number of groups
Common standard deviation (Enter values > 0)
Minimum expected difference between groups (Enter values > 0)
Drop-out rate (Enter values 0 to 1)
Common standard deviation (Enter values > 0)
Group 1 mean (Enter values > 0)
Group 2 mean (Enter values > 0)
Group 1 sample size
Group 2 sample size
Sample size ratio between groups (Enter values > 0)
Incidence of events in 1st group (%) (Enter values 0 to 1)
Incidence of events in 2nd group (%) (Enter values 0 to 1)
Desired Hazard ratio (Enter values > 0)
Drop-out rate (Enter values 0 to 1)
Pearson's correlation coeficient estimation (Enter values 0 to 1)
Drop-out rate (Enter values 0 to 1)
Proportion of positive result by first rater (Enter values 0 to 1)
Proportion of positive result by second rater (Enter values 0 to 1)
Expected Kappa value (Enter values 0 to 1)
Null hypothesis Kappa Value (Enter values 0 to 1)
Drop-out rate (Enter values 0 to 1)
Expected ICC (Enter values 0 to 1)
Null hypothesis ICC (Enter values 0 to 1)
Number of ratings per subject
Item substitution rate (Enter values 0 to 1)