(a) What percentage of people has an IQ score between 70 and 130? (b) What percentage of people has an IQ score less than 80 or greater than 120? (c) What percentage of people has an IQ score greater than 110?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 10. Use the empirical rule to determine the following.
(a) What percentage of people has an IQ score between 70 and 130?
(b) What percentage of people has an IQ score less than 80 or greater than 120?
(c) What percentage of people has an IQ score greater than 110?
ar
(a) % (Type an integer or a decimal.)
ra
Transcribed Image Text:Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 10. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 70 and 130? (b) What percentage of people has an IQ score less than 80 or greater than 120? (c) What percentage of people has an IQ score greater than 110? ar (a) % (Type an integer or a decimal.) ra
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