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Fundamentals of Statistics | 4th Edition | ISBN: 9780321838704 | Authors: Michael Sullivan,III
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Chapter 9, Problem 29AYU

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Problem 29AYU

Problem

The Empirical Rule One measure of intelligence is the Stanford–Binet Intelligence Quotient (IQ). IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15.

(a) What percentage of people has an IQ score between 70 and 130?

(b) What percentage of people has an IQ score less than 70 or greater than 130?

(c) What percentage of people has an IQ score greater than 130?

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QUESTION:

Problem 29AYU

Problem

The Empirical Rule One measure of intelligence is the Stanford–Binet Intelligence Quotient (IQ). IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15.

(a) What percentage of people has an IQ score between 70 and 130?

(b) What percentage of people has an IQ score less than 70 or greater than 130?

(c) What percentage of people has an IQ score greater than 130?

ANSWER:

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