This calculator computes confidence intervals of a sum, difference, quotient or product of two means, assuming both groups follow a Gaussian distribution.

1. Choose data entry format
Enter mean, N and SD.
Enter mean, N and SEM.
Caution: Changing format will erase your data.

2. Enter data

3. Which operation?
Calculate the confidence interval of:
A + B
A  B
A / B
A * B

4. View the results
