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Normal Probability Distribution Calculator Using the Calculator: 1. Enter a “Z Score” and click “Calculate” to get the probability that a standard Normal random variable is less than the Z score. 2. Enter a “Probability” and click “Calculate” to get the Z score that a standard Normal random variable has the probability of being less than. 3. You can change the region to be calculated to a) “Less” mean P(Z < “Z Score”) = “Probability” b) “Right” mean P(Z > “Z Score”) = “Probability” c) “Central” mean P(-“Z Score” < Z < “Z Score”) = “Probability” DataTools Click on the name of the data file to open a DataTools window with the data loaded. Choose “Show info” from the “Data” menu to get a description of the dataset:
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