Since the test compares means, the variable of interest should be continuous (for example, age or weight). Where s is the sample's standard deviation and n is the number of observations in the sample.

This calculation can be used for hypothesis testing in statistics Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive ...

For example ... 1: The uncertainty in a sum or difference of random variables is the sum of the variables' individual uncertainties, as measured by the variance. Figure 2: In the two-sample test ...