Statistical Test for Google Analytics is an add-on for Google Analytics that lets you compare timeframes by calculating the difference between them and evaluating it for statistical significance.

How does it work?

First of all, it calculates the difference between the two-time frames being compared, by subtracting the value of one from the other. It then makes a decision whether the difference is significant or not, depending on the number of points to be compared and the significance level of the test (5 40 for a Student's t-test).

If the change is significant, the value of the difference between the two-time frames is higher than the value of the mean of both differences.