Explanation Given: The mean IQ score for 1500 students is 100 , with a standard deviation of 15 . Approach: (1) The standard deviation for the numbers x 1 , x 2 , … , x n is given by s = ∑ i = 1 n ( x i − x ¯ ) 2 n Where x ¯ is the mean and x i is each term. (2) A normal distribution has a graph which is bell-shaped curve or normal curve. Within one standard deviation of the mean, about 68 % of the values lies, within two standard deviations, about 95 % of the values lie and within 3 standard deviation, about 99 To determine (b) To find: The number of students with an IQ between 70 and 130 . To determine (c) To find: The number of students with an IQ over 145 .

A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)

13th Edition

ISBN: 9780135183885

Author: Rick Billstein, Shlomo Libeskind, Johnny Lott, Barbara Boschmans

Publisher: PEARSON

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Chapter 10.4B, Problem 22A

To determine

(a)

To find:

The number of students with an IQ between 85 and 115.

To determine

(b)

To find:

The number of students with an IQ between 70 and 130.

To determine

(c)

To find:

The number of students with an IQ over 145.

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Chapter 10.4B, Problem 21A

Chapter 10.4B, Problem 23A

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Chapter 10 Solutions

A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)

Ch. 10.1 - Suggest how students at different grades might...Ch. 10.1 - Mathematical Connections What are the Nielsen...Ch. 10.1 - Prob. 4MC Ch. 10.1 - Read about basic ideas of statistics in Common...Ch. 10.1 - National Assessment of Educational ProgressNAEP...Ch. 10.1 - Prob. 2NAEP Ch. 10.1 - Prob. 3NAEP Ch. 10.1A - If one wanted to study the effect of using a...Ch. 10.1A - Prob. 2A Ch. 10.1A - Prob. 3A

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(a) To find: The number of students with an IQ between 85 and 115 .

Solution Summary: The author explains that the number of students with an IQ between 85 and 115 is 1020.

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(a)

To find:

The number of students with an IQ between 85 and 115.

(b)

To find:

The number of students with an IQ between 70 and 130.

(c)

To find:

The number of students with an IQ over 145.

Want to see the full answer?

Chapter 10 Solutions

(a) To find: The number of students with an IQ between 85 and 115 .

Solution Summary: The author explains that the number of students with an IQ between 85 and 115 is 1020.

Concept explainers

Videos

(a) To find: The number of students with an IQ between 85 and 115.

(b) To find: The number of students with an IQ between 70 and 130.

(c) To find: The number of students with an IQ over 145.

Want to see the full answer?

Chapter 10 Solutions

(a)

To find:

The number of students with an IQ between 85 and 115.

(b)

To find:

The number of students with an IQ between 70 and 130.

(c)

To find:

The number of students with an IQ over 145.