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Chapter 2: Q.2.42 (page 67)
Identify an important reason for grouping data.
In the event of big data sets, data grouping is important.
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Construct a stem-and-leaf diagram for the data, using two lines per stem.
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?
A quantitative data set has been grouped by using limit grouping with equal-width classes. The lower and upper limits of the first class are and , respectively, and the class width is .
a. What is the class mark of the second class?
b. What are the lower and upper limits of the third class?
c. Which class would contain an observation of ?
Distribution of a data set.
Suggest a way in which the developer can accurately illustrate that twice as many homes will be built in the area this year as last.
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