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ISBN: 9780137566334

Author: Blitzer

Publisher: PEARSON

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Chapter 12.4, Problem 28E

Intelligence quotients (IQs) on the Stanford-Binet intelligence test are normally distributed with a mean of 100 and a standard deviation of 16. In Exercises 23-32, use the 68-95-99.7 Rule to find the percentage of people with IQs

above 132.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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Chapter 12.4, Problem 27E

Chapter 12.4, Problem 29E

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Chapter 12 Solutions

THINKING MATHEMATICALLY WITH INTEGRATED

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Intelligence quotients (IQs) on the Stanford-Binet intelligence test are normally distributed with a mean of 100 and a standard deviation of 16. In Exercises 23-32, use the 68-95-99.7 Rule to find the percentage of people with IQs above 132.

Solution Summary: The author calculates the percentage of persons who have an IQ level above 132 using percentage rule of normal distribution.

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