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In addition to NOAA-GLERL, several other institutions also have routine monitoring programs on Lake Erie. Data file LakeErie2.csv contains TP and chla concentration data collected by NOAA-GLERL, Ohio Department of Natural Resources (ODNR), and The University of Toledo (Toledo). (a) Compare the distribution of the TP concentration data from NOAA to the same from ODNR: […]

 

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The Great Lakes Environmental Research Laboratory of the U.S. National Oceanic and Atmospheric Administration (NOAA-GLERL) routinely monitors the western basin of Lake Erie from May to October every year. The data file LakeErie1.csv includes all available data up to the end of 2014. Two variables are of particular interest in studying lake eutrophication. They are […]

 

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Carl Sagan’s intelligence data. In his book, The Dragons of Eden, Carl Sagan presented a graph showing the brain and body masses, both on log scale, of a collection of animal species. The purpose of the graph was to describe an intelligence scale: the ratio of the average brain weight over the average body weight […]

 

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In a normal Q-Q plot, we expect to see data points line up to form a straight line when they are random samples from a normal distribution. As in almost all statistical rules, this expectation is literally an “expectation” or what we expect to see on average. When the sample size of the data is […]

 

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