The scores on a psychology exam were normally distributed with a mean of 59 and a standard deviation of 5. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed?
The scores on a psychology exam were normally distributed with a mean of 59 and a standard deviation of 5. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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The scores on a psychology exam were normally distributed with a mean of
59
and a standard deviation of
5.
A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed?Question content area bottom
Part 1
The cutoff for a failing score was
enter your response here.
(Simplify your answer.)
Part 2
Approximately
enter your response here
percent of the students failedExpert Solution
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