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Chapter 2: Q. 2.27 (page 50)
For each data sets in Exercises2.26-2.31,
a. determine a frequency distribution.
b. obtain a relative-frequency distribution.
c. draw a pie chart.
d. Construct a bar chart.
d
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Suppose that you have a data set that contains a large number of observations. Which graphical display is generally preferable; a histogram or a stem-and-leaf diagram? Explain your answer.
Construct a dot plot for the data.
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.
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.
We have drawn a smooth curve that represents a distribution,
a. Identify the shape of the distirbution with regard to modality.
b. Identify the shape of the distribution with regard to symmetry (or non symmetry)
c . If the distribution is unimodal and non symmetric, classify it as either right skewed or left skewed.
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