Howdy folks, and welcome to the last episode before the Midterm! I know, you're all very excited for that... but pump the brakes because before we get there we need to finish our discussion of probability and the normal curve. In this episode, we review our learning about those topics and connect it to the use of z-scores, which are a way of telling us how different a specific value is from the mean. Z-scores are a measure that uses standard deviation--that value we went over all the way back in week 2! We will spend time defining z-scores and then working on calculating them... and then connecting it back to probability or the chances that our data value is normal or rare. Put on your thinking caps, push through the material, and as always let me know when and if you have questions!