A statistics interview is a technical interview that evaluates necessary skills for the daily work of a data scientist. You have to be able to ace this interview if you want to land a data science job.

However, statistics is a broad subject. Thankfully, you do not have to know all of it to be a...

The z-test is a great asset to use when exploring proportions. In this video, I go over conducting both one-proportion and two-proportion tests, using loads of step-by-step examples. I’ll also share some of my top tips on when to use “pooled” vs. “unpooled” variance....

The z-test is one of the most basic, and commonly used hypothesis tests. There are many data science interview questions on z-tests, so in this video we’ll dive into when to use it, and how to conduct both one-sample and two-sample z-tests for means.