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Math 120 Name Chapter 6 Homework Section 6.1: The Standard Normal Distribution 1. On a certain exam, scores are normally distributed with u = 80 and o = 8. a. Find the z-scores for each exam score. Are any of these unusual? 72 90 99 b. Approximately what percent of students score between 72 and 88? c. Approximately what percent of students score between 64 and 96? d. Approximately what percent of students score more than 96? . Approximately what is the percentile ranking of the student with the exam score 72