AdminDec 31, 20172 minStandard Deviation & Standard ErrorStandard Deviation Standard Deviation is a measure of spread. A low standard deviation tell us the data is closely clustered around the m...

AdminDec 31, 20175 minThe Concept and Math Behind the "Two Proportions Z-Test"When analyzing the results of an AB test, we usually compare the conversion rate, add to cart rate, sign up rate etc, (some sort of a pro...