Calculating the Average and Uncertainty in the Average

This is an updated version of an old video. Old video: Simple Calculations of Average and th...

A couple notes:
1) This is the simplest possible method of finding uncertainty in the average. Your teacher/professor/boss might want a more complicated/nuanced method! (I use this for introductory IB Physics.)
2) There are some details not covered in this video. This is only for straightforward cases!
3) Seriously, if you're using this for someone else's class, make sure you check to see whether my method agrees with their method. Uncertainties and statistics are a deep topic with a lot of different tools and techniques, and I'm not the one who will be grading you!