Suppose that scores on a test are normally distributed with a mean of 80 and a standard deviation of 8. Read the two questions below. A. What is the 90th percentile? B. What percentage of students score less than 90? Explain the difference between the two questions. Describe how the method for solving A would differ from the the method for solving B. Be sure to include in your explanation a description of how the table of areas would be used in each case.
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