Batman Solves Crimes: A One-Sample Z-test Example

In this video we look at the assumptions for a z-test and then perform it in Excel. I walk through the formulas and spend a little extra time on how I constructed the two-tail test formula - there should be a card to my "Which tail am I in?" video for more depth. While I do this example with data, you can do it without, and most of the time will. If you got anything out of this video...that makes me happy. [0:00] Introduction to the Problem [1:10] Assumptions for a Z-test [1:34] Formulas in Excel [4:45] Formula for the Two-Tail Test [5:55] Interpretation