6th Edition

ISBN: 8220100802713

Author: Briggs

Publisher: PEARSON

Concept explainers

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A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow compar…

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Textbook Question

Chapter 6.B, Problem 15E

Comparing Variations. Consider the following data sets.

a. Find the mean, median and range for each of the two data sets.

b. Give the five-number summary and draw a boxplot for each of the two data sets.

c. Find the standard deviation for each of the two data sets.

d. Apply the range rule of thumb to estimate the standard deviation of each of the two data sets. How well does the rule work in each case? Briefly discuss why it does or does not work well.

e. Based on all your results compare and discuss the two data sets in terms of their center and variation.

15. The table below gives the cost of living index (COLI) for six East Coast counties and six Midwest counties (using the ACCRA 2013 index, where 100 represents the average cost of living for all participating cities with a population of more than 1.5 million).

East Coast Counties	Midwest Counties
Miami-Dade FL	104.8	Edwards II	96.5
Union NJ	128.3	Scott IN	92.9
New York NY	314.2	Schuyler MO	94.4
Richmond NY	134.2	Adair OK	87.4
Philadelphia PA	123.4	McCulloch TX	95.4
Arlington VA	141.1	Loving TX	228.2

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Chapter 6.B, Problem 14E

Chapter 6.B, Problem 16E

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Chapter 6 Solutions

EBK USING AND UNDERSTANDING MATHEMATICS

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