Chapter 2: Q. 2.72 (page 69)
Construct a dot plot for the data.

Short Answer

Chapter 2: Q. 2.72 (page 69)
Construct a dot plot for the data.


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Distribution of a variable.
As mentioned, for relative-frequency polygons, we label the horizontal axis with class marks in limit grouping and class midpoints in cut point grouping. How do you think the horizontal axis is labeled in single-value grouping.
Top 10 Green Cars. The following table presents information on the Kelley Blue Book's "10 Best Green Cars of 2013." Note that mpg and mpge are abbreviations for miles per gallon and miles per gallon equivalent, respectively. Identify the type of data provided by the information in each column of the table. [SOURCE: "10 Best Green Cars of 2013." Published by the Kelley Blue
For data that are grouped in classes based on more than a single value, lower-class limits (or cut points) are used on the horizontal axis of a histogram for depicting the classes. Classmarks (or midpoints) can also be used, in which case each bar is centered over the mark (or midpoint) of the class it represents. Explain the advantages and disadvantages of each method.
Age of Passenger Cars. According to R. L. Polk & Co., the average age of passenger cars in the United States was years in . A sample of passenger cars taken this year provided the ages, in years, displayed in the following table. Construct a dotplot for the ages.
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