Chapter 3: Second Video litle mistake

Hi, I tried to solve the first lab in chapter 3, by using the $stdDevSam (like seen in the video “Highlights”) getting an “unknown group operator” error.
So I thought I’ve misunderstand the lab or had the wrong version of MongoDB installed.
Then I realized it should be $stdDevSamp instead of $stdDevSam.

Should be changed in the video as it’s a little confusing.




You are absolutely right, thank you very much for pointing this out.

José Carlos