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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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Construct a dot plot for the given data.
Ages of Householders. The ages of householders, given as a whole number
In this case, decide which type of grouping (single-value, limit, or cutpoint) is probably the best.
Number of Cars. The number of automobiles per family
In this case, decide which type of grouping (single-value, limit or cutpoint is probably the best.
Explain the advantages and disadvantages of frequency histograms versus frequency distributions.
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.
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