Power
Sample size per group
Sample size in group 2
Allocation ratio n1:n2 :
Drop-out rate
Calculate
Press the Calculate button to calculate the sample size.
Calculate Sample size Power (output decimal places: )
Advanced Unequal sample sizes Account for drop-outs Bonferroni correction
Mean 1
Mean 2
Mean 3
Standard deviation
Specific options Add group Remove group
Sample size in group 3
Allocation group 1
Allocation group 2
Allocation group 3