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ZScores - ZScores Doug Jones Thu.02.24.11 So you want to...

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ZScores.doc / page 1 of 2. ZScores Doug Jones / Thu.02.24.11 So you want to calculate a z-score on your TI-83/84! OK, let s say you ve got a data set --- for purposes of illustration, let s enter {1, 12, 33, 9, 18, 5} into L1. Now I hope that you will recall the formula for a z-score: xx z s . This formula (equation) requires that you know the mean and the standard deviation. So do you have to calculate the mean and standard deviation before you calculate the z-score of one of the x s? NO. A. We are going to calculate all the z-scores at once for the 6 data points in the example above. Here s how it works: 1. Enter the data. (We ll use L1 in this example). And make sure that L2 is cleared.

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ZScores - ZScores Doug Jones Thu.02.24.11 So you want to...

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