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The Fourth Big Idea

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Let's do it again! The student down the hall runs into our gang's room. She yells, "I got an 84 on the Physics test!!"

1. Her Z-Score equals 3.4 because:

Z = (Score - Mean)/SD
Z = (84 - 50) / 10
Z = 3.4

This is a bright young person. Let's look at the Z-Score ruler on the normal curve. She gets a very big happy face

She's done better than almost everyone in the class!

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