Concept explainers
To find: the percentage of those who took the test had a score more than 100 points above or below the mean.
Answer to Problem 54E
Explanation of Solution
Given:
Thescore of a national achievement test are normally with a mean of 500 and a standard deviation of 100.
Calculation:
Thepercent of those who took the test and had a score more than 100 points above or below the mean is the percent of people that lie within 1 standard deviation of the mean (because standard deviation is 100)
In
So,
Thus,
Chapter 15 Solutions
Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
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