Understandable Statistics: Concepts and Methods

12th Edition

ISBN: 9781337119917

Author: Charles Henry Brase, Corrinne Pellillo Brase

Publisher: Cengage Learning

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Textbook Question

Chapter 2.1, Problem 17P

For Problems 15-20, use the specified number of classes to do the following.

(a) Find the class width.
(b) Make a frequency table showing class limits, class boundaries, midpoints, frequencies, relative frequencies, and cumulative frequencies.
(c) Draw a histogram.
(d) Draw a relative-frequency histogram.
(e) Categorize the basic distribution shape as uniform, mound-shaped symmetric, bimodal, skewed left, or skewed right.
(f) Draw an ogive.
(g) Interpretation Discuss some of the features about the data that the graphs reveal. Consider items such as data range, location of the middle half of the data, unusual values, outliers, etc.

17. Medical: Tumor Recurrence Certain kinds of tumors tend to recur. The following data represent the lengths of time, in months, for a tumor to recur after chemotherapy (Reference: D. P. Byar, Journal of Urology, Vol. 10, pp. 556–561). Note: These data are also available for download at the Companion Sites for this text.

Chapter 2.1, Problem 17P, For Problems 15-20, use the specified number of classes to do the following. (a) Find the class

Use five classes.

Definition Definition Measure of central tendency that is the value that occurs most frequently in a data set. A data set may have more than one mode if multiple categories repeat an equal number of times. For example, in a data set with five item—3, 5, 5, 29, 473—the mode is 5 because it occurs twice and no other value occurs more than once. On a histogram or bar chart, the element with the highest bar represents the mode. Therefore, the mode is sometimes considered the most popular option. The mode is useful for nominal or categorical data (e.g., the most common color car that users purchase), but it is problematic for continuous data because it is more likely not to have any value that is more frequent than the other.

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Chapter 2.1, Problem 16P

Chapter 2.1, Problem 18P

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Chapter 2 Solutions

Understandable Statistics: Concepts and Methods

Ch. 2.1 - Statistical Literacy What is the difference...Ch. 2.1 - Statistical Literacy A data set has values ranging...Ch. 2.1 - Statistical Literacy A data set has values ranging...Ch. 2.1 - Prob. 4P Ch. 2.1 - Basic Computation: Class Limits A data set with...Ch. 2.1 - Prob. 6P Ch. 2.1 - Interpretation You are manager of a specialty...Ch. 2.1 - Prob. 8P Ch. 2.1 - Critical Thinking Look at the histogram in Figure...Ch. 2.1 - Critical Thinking The following data represent...

Ch. 2.1 - Interpretation Histograms of random sample data...Ch. 2.1 - Prob. 12P Ch. 2.1 - Interpretation The ogives shown are based on U.S....Ch. 2.1 - Prob. 14P Ch. 2.1 - For Problems 15-20, use the specified number of...Ch. 2.1 - For Problems 15-20, use the specified number of...Ch. 2.1 - For Problems 15-20, use the specified number of...Ch. 2.1 - Prob. 18P Ch. 2.1 - For Problems 15-20, use the specified number of...Ch. 2.1 - Prob. 20P Ch. 2.1 - Expand Your Knowledge: Decimal Data The following...Ch. 2.1 - Decimal Data: Batting Averages The following data...Ch. 2.1 - Expand Your Knowledge: Dotplot Another display...Ch. 2.1 - Prob. 24P Ch. 2.1 - Dotplot: Tumor Recurrence Make a dotplot for the...Ch. 2.2 - Interpretation Consider graph (a) of Reasons...Ch. 2.2 - Reasons People Like Texting on Cell Phones (b)...Ch. 2.2 - Critical Thinking A personnel office is gathering...Ch. 2.2 - Prob. 4P Ch. 2.2 - Education: Does College Pay Off? It is costly in...Ch. 2.2 - Prob. 6P Ch. 2.2 - Commercial Fishing: Gulf of Alaska Its not an easy...Ch. 2.2 - Prob. 8P Ch. 2.2 - Lifestyle: Hide the Mess! A survey of 1000 adults...Ch. 2.2 - Prob. 10P Ch. 2.2 - FBI Report: Hawaii In the Aloha state, you are...Ch. 2.2 - Prob. 12P Ch. 2.2 - Prob. 13P Ch. 2.2 - Prob. 14P Ch. 2.2 - Prob. 15P Ch. 2.2 - Prob. 16P Ch. 2.3 - Cowboys: Longevity How long did real cowboys live?...Ch. 2.3 - Ecology: Habitat Wetlands offer a diversity of...Ch. 2.3 - Health Care: Hospitals The American Medical...Ch. 2.3 - Health Care: Hospitals Using the number of...Ch. 2.3 - Expand Your Knowledge: Split Stem The Boston...Ch. 2.3 - Prob. 6P Ch. 2.3 - Prob. 7P Ch. 2.3 - Prob. 8P Ch. 2.3 - Prob. 9P Ch. 2.3 - Prob. 10P Ch. 2 - Prob. 1CRP Ch. 2 - Critical Thinking A consumer interest group is...Ch. 2 - Prob. 3CRP Ch. 2 - Prob. 4CRP Ch. 2 - Prob. 5CRP Ch. 2 - Prob. 6CRP Ch. 2 - Prob. 7CRP Ch. 2 - Prob. 8CRP Ch. 2 - Prob. 9CRP Ch. 2 - Prob. 10CRP Ch. 2 - Prob. 11CRP Ch. 2 - Prob. 12CRP Ch. 2 - Prob. 1DH Ch. 2 - Prob. 2DH Ch. 2 - In your own words, explain the differences among...Ch. 2 - What do we mean when we say a histogram is skewed...Ch. 2 - Discuss the statement that stem-and-leaf displays...Ch. 2 - Prob. 1UT Ch. 2 - Prob. 2UT Ch. 2 - Prob. 3UT

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