what to use to test the difference between two groups of data how to test the difference between two groups how to test the difference in two groups of data how to test the difference between two groups of data how to test difference graph how can we test difference between two data sets on graph how does data show differences how to test difference between two data sets can a dummy variable test differences what is meant by the statement of two data sets in the same line test difference between two variables in graphs how to test the difference of two data sets how can i find the difference between two sets of data on the same line? how to plot two groups of data together to find difference how to test the point of a set of data how do i test data differences in two sets of data how to test the difference between two groups of data in a graph can we tell the difference of two groups of data in one line what is an example of testing the difference between two groups of data in the same line? test dummies