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Chapter 2: Q. 2.124 (page 80)
Population data.
A population is the group of people from which a statistical sample is selected for a research in statistics.
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M&Ms. In the article "Sweetening Statistics-What M&M's Can Teach Us" (Minitab Inc., August 2008), M. Paret and E. Martz discussed several statistical analyses that they performed on bags of M&Ms. The authors took a random sample of small bags of peanut M&Ms and obtained the following weights, in grams (g). Construct a stem-and-leaf diagram for these weights.
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.
Detroit Tigers. From the Baseball Almanac website, we found the heights, in inches, of the players on the 2012 World Series runner-up Detroit Tigers baseball team.
Use the graph to answer the following questions. Note that cholesterol levels are always expressed as whole numbers.
a. Construct a stem-and-leaf diagram of these data with five lines per stem.
b. Why is it better to use five lines per stem here instead of one or two lines per stem?
Construct a stem-and-leaf diagram for the data, using two lines per stem.
Of the variables you have studied so far, which type yields non numerical data ?
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