Alligators have become a big concern in Florida. Here are some gator data.

The rows are for five small Florida lakes. They stretch along a line from the west coast near Tampa to the east coast. The columns are for years, spaced half a decade apart. The counts tell the numbers of alligators harvested. (Data source: myfwc. com/mediaˆ™1357388ˆ™Alligator_Annual_Summaries.pdf.) Look first at the column totals: Is there a trend over time? Then look at row totals: How do lakes compare? Finally, think about association. Is the pattern over time pretty much the same for all five lakes?

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Year 2005 2010 Lake 2000 Total Pierce 12 8 16 36 Marian 30 50 90 170 Hatchineha 36 71 135 242 Blue Cypress 31 66 128 225 Seminole 16 25 16 57 Total 125 220 385 730