Basic Statistics: Tales of Distributions 10th Edition

Published by Cengage Learning
ISBN 10: 0-49580-891-1
ISBN 13: 978-0-49580-891-6

Chapter 7 - Theoretical Distributions Including the Normal Distribution - Problems: 7.7

Answer

The professor awarded A's to about .0668, or 6.68% of the students.

Work Step by Step

We use the table of Normal curve areas to find the proportion of the class that was awarded an A. First, go to column A to find the z score of 1.5. Then, use column C to find the proportion of students with a z score of 1.50 or higher (from z). The value from column C is .0668
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