Calculating and understanding z-scores with TI-nspire

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How can you compare values from two different normal distributions? Convert them to z-scores. In this video we compare high scores from one of the biggest selling games of all times, Space Invaders. How can we compare original scores with modern day scores? This video works through this sample problem to help make sense of z-scores. TI-nspire is used to create the mathematical animations and to perform the calculations.
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There isnt a pre made function for this I take it.

codyhanthorn