Z-test calculator for Google AnalyticsGoogle Analytics
Just a quick note that due to popular demand (ok, just Brian C.) we have updated the z-test bookmarklet for Google Analytics. Obviously, if the GA UI gets updated the bookmarklet will probably not work anymore.
Just drag the button to your browser bar.
The cool thing is that the bookmarklet now works in the new summary page, which shows Acquisition, Behavior and Conversion sections. You can now just select individual goals, which wasn't possible before.