The two-sample t-test is a useful means of comparing samples from two different data sets. However, it isn’t the sole tool for use when looking for variance. You’ll want to consider other ...

In the Two-Sample Test for Proportions task, you can determine whether two probabilities are the same. The data analyzed in this example are taken from a study measuring the accuracy of two computer ...

This web calculator conducts a z-test for the difference between two populations' proportions. The calculator includes an explanation of inputs and outputs. This web calculator conducts a z-test for ...