Click on the following links. Please note these will open in a new window.

Calculating ∑X from a Frequency Table
https://www.youtube.com/watch?v=14G91DzRMvs
This video was created by Chieh-Chen Bowen.

Constructing frequency distribution tables
https://www.youtube.com/watch?v=7jUIt39tUBM
Describes the idea and demonstrates the steps that entail creating a three column frequency distribution table showing frequencies and relative frequencies.

Making bar graphs 
https://www.youtube.com/watch?v=foyPpC3XjhE
Art of Problem Solving: Bar Charts and Pie Charts