The College of Portland uses a diagnostics test to correctly place students in math courses. Scores on

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The College of Portland uses a diagnostics test to correctly place students in math courses. Scores on the test are normally distributed with a mean of 400 and a standard deviation of 50.

1. Using the 68-95-99.7 rule, find the percentage of scores within 50 of the mean of 400.

2. Using the 68-95-99.7 rule, find the percentage of scores between 300 and 500.

3. Is a score of 550 unusual? Why or why not? Explain.

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Statistical Reasoning for Everyday Life

ISBN: 978-0321817624

4th edition

Authors: Jeff Bennett, Bill Briggs, Mario F. Triola

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Question Posted: Dec 23, 2015 07:34 AM

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The College of Portland uses a diagnostics test to correctly place students in math courses. Scores on

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1 Since 50 is one standard deviation about 68 of the scores are with...View the full answer

Statistical Reasoning for Everyday Life

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