Chapter 2: Q. 8 (page 88)
When is the use of single-value grouping particularly appropriate?
Short Answer
When there are only a few different values in the data
Chapter 2: Q. 8 (page 88)
When is the use of single-value grouping particularly appropriate?
When there are only a few different values in the data
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Get started for freeAdjusted Gross Incomes. The Internal Revenue Service (IRS) publishes data on adjusted gross incomes in Statistics of Income, and Individual Income Tax Returns. The following relative frequency histogram shows one year's individual income tax returns for adjusted gross incomes of less than .
Use the histogram and the fact that adjusted gross incomes are expressed to the nearest whole dollar to answer each of the following questions.
a. Approximately what percentage of the individual income tax returns had an adjusted gross income betweenand , inclusive?
b. Approximately what percentage had an adjusted gross income of less than ?
c. The IRS reported that individual income tax returns had an adjusted gross income of less than . Approximately how many had an adjusted gross income between and , inclusive?
Give one reason why constructing and reading graphs and charts carefully is important.
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.
Draw a smooth curve that represents a symmetric trimodal (three-peak) distribution.
Explain the advantages and disadvantages of frequency histograms versus frequency distributions.
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