A Problem Solving Approach to Mathematics for Elementary School Teachers (12th Edition)

12th Edition

ISBN: 9780321987297

Author: Rick Billstein, Shlomo Libeskind, Johnny Lott

Publisher: PEARSON

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Textbook Question

Chapter 10.5, Problem 2NAEP

Richard wants to estimate the average (mean) monthly temperature of the United States last year. He will choose one of the following two methods to do this.

Method I: Richard selects his state and 9 other states that are near his state. Then he finds the average (mean) monthly temperature of each of those 10 states and uses those numbers to compute the average monthly temperature of the United States.

Method II: Richard selects 10 different states by writing the names of all 50 states on cards, with one state’s name on each card. Then he places all of the cards in a hat and takes out 10 cards without looking. Finally, he finds the average (mean) monthly temperature of each of those 10 states and uses those numbers to compute the average monthly temperature of the United States.

Which method is better, I or II?

Explain why.

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Chapter 10.5, Problem 1NAEP

Chapter 10.5, Problem 3NAEP

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Chapter 10 Solutions

A Problem Solving Approach to Mathematics for Elementary School Teachers (12th Edition)

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Solution Summary: The author compares method I and method II for finding the average monthly temperature of the United States.

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