Causation Defined & 5 Key Checks for Signs of Causattion

I defined causation, review the two types of lurking variables, and I go over the 5 checks for evidence of causation. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob