© 2013 Pearson Education, Inc.

Active Learning Lecture Slides For use with Classroom Response Systems

Introductory Statistics:Exploring the World through Data, 1e

by Gould and Ryan

Chapter 2: Reading Quiz 4 (sections 2.3-2.5)Slide 2 - 1

True or FalseTwo commonly used graphs to display the distribution of a sample of categorical data are bar charts and pie charts.

A. TrueB. False

Slide 2 - 2© 2013 Pearson Education, Inc.

A. B.

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True or FalseBar charts are the same exact graphs as histograms.

A. TrueB. False

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A. B.

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Bar charts that are sorted from most frequent to least frequent are called

A. Sorted charts.B. Pareto charts.C. Histograms.D. None of the above.

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A. B. C. D.

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Pie charts are graphical summaries for categorical data and

A. Show the proportion of observations that belong to each category.

B. Each category is represented by a wedge in the pie.

C. The area of the wedge is proportional to the relative frequency of that category.

D. All of the above.

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A. B. C. D.

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The category that occurs the most often is called the

A. Mean.B. Median.C. Mode.D. Range.

Slide 2 - 6© 2013 Pearson Education, Inc.

A. B. C. D.

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True or FalseIf a distribution has only a little diversity (many of the observations fall into the same category), then variability is low.

A. TrueB. False

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A. B.

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True or FalseIn terms of misleading graphs, the most common “trick”—one that is particularly effective with bar charts—is to change the scale of the vertical axis so that it does not start at the origin (0).

A. TrueB. False

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A. B.

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True or FalseMost of the misleading graphics you will run across exploit a similar theme: Our eye tends to compare the relative sizes of objects; that is, their area, not just their height.

A. TrueB. False

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A. B.

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True or FalseIf a distribution has a lot of diversity (many observations in many different categories), then variability is low.

A. TrueB. False

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A. B.

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True or FalseWhen summarizing graphs of categorical data, one should report the mode or modes and describe the variability (diversity).

A. TrueB. False

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A. B.

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