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

Short Answer

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


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This exercise deals with truncated graphs.
a. What is a truncated graph?
b. Give a legitimate motive for truncating the axis of a graph.
c. If you have a legitimate motive for truncating the axis of a graph, how can you correctly obtain that objective without creating the possibility of misinterpretation?
Adjusted Gross Incomes. The Internal Revenue Service (IRS) publishes data on adjusted gross incomes in the document Siarisuics of Income, Individual Income Tax Reforms. The following relative-frequency histogram shows one year's individual income tax returns for adjusted gross incomes of less than 50,000.

Recording Industry Statistics. The Recording Industry Association of America (RIAA) reports annual statistics on shipments and revenues. For the year 2012, RIAA reported the following data on physical shipments. [SOURCE: Year.End industry Shipment and Revenue Statistics. Published by RIAA, (c) 2012.]

Identify the type of data provided by the information in each of the following columns of the table:
a. first b. second c. third
Construct a stem-and-leaf diagram for the data, using five lines per stem.

Weights of 18- to 24-Year-Old Males. Refer to the weight data in Table on page 54 . Note that there are 37 observations, the smallest and largest of which are and, respectively. Apply the preceding procedure to choose classes for cut point grouping. Use approximately eight classes. Note: If in Step 2 you decide on 20 for the class width and in Step 3 you choose 120 for the lower cut point of the first class, then you will get the same classes as used in Example 2.14; otherwise, you will get different classes (which is fine).
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