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A normal distribution has a mean of 140 and a standard deviation of 40. How do you calculate a percentile rank of a score of 172? | Socratic
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Normal Probability, Middle 20 Percent, and 90th Percentile (in Excel) OpenStax - Example 6.12 - YouTube
Is it possible to find the highest value and the lowest value in the range using the standard deviation? - Quora
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