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

A Clear Explanation of Type I Error versus Type II Error
https://www.youtube.com/watch?v=8P65wxFQLR0
This video was created by Chieh-Chen Bowen.

Introduction to Hypothesis Testing
https://www.youtube.com/watch?v=B9u_grPccUs
How to calculate One Tail and Two Tail Tests For Hypothesis Testing