Unpaired t-test
Test for non-inferiority
Start by entering the group means and standard deviation.
Reference mean:
Test mean:
Standard deviation:
To demonstrate non-inferiority, you can change any one of the values below.
Then click 'Result'.
Threshold for mean difference:
Mean that test mean is to be different from:
Difference that effect exceeds:
Click here for sample size:
You will need
subjects in Group 1
You will need
subjects in Group 2
For different power or significance level, change the fields below:
Alpha: Prob(reject H
_{0}
when H
_{0}
is true)
0.05
0.01
0.005
0.001
0.0005
0.0001
Power: Prob(reject H
_{0}
when H
_{1}
is true)
0.80
0.90
For unequal sample sizes, change the ratio below:
Grouy/Groux:
Choose another
study design
v. 03/03
Contact: sfh2@columbia.edu