Choose a Data Set to view various data. Alternatively, enter values for each
region in the table; then, click Update Map to view the results.
The Clear Data button can be used to replace all data with X's. An X
indicates that there is no data entered for that state, and data for that state
will not influence the mean or five-number summary. (By contrast, a data value
of "0" will influence the measures of center.) Click Hide Map Numbers to remove
the data from the map. (The data will still be displayed in the table, however.)
Change the color of the shading by selecting a different color from the Map
Color pull-down menu.
Select the Data Set for Land Area. As expected, regions that look bigger are a
darker color, because larger regions have more area.
An attribute that is not obvious by visual inspection is the population.
Choose Population from the Data Sets menu. Do the largest regions have the
Now, combine these two elements by opening the Data Set for Population
Density. You'll notice that most of the regions appear in a very light shade.
Can you explain why that happens?
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