The data file co2data.csv contains monthly mean atmospheric CO2 concentrations measured at Mauna Loa, Hawaii, from January 1959 to December 2003. Atmospheric CO2 concentrations show a distinct seasonal pattern, reflecting the annual cycle of plant activities. The data set has four columns: CO2 (monthly CO2 concentrations in ppm), mon (calendar month), year, and months (months […]
Increased nitrogen loading to rivers due to human activities was blamed for the rise in abundance of algae in coastal waters. For example, the Neuse River Estuary fishkills in the 1990s were attributed to the increased algae due to increased nitrogen loading from the Neuse River basin, especially from concentrated animal farming in Eastern North […]
Schoener [1968] collected information on the distribution of two Anolis lizard species (A. opalinus and A. grahamii) to see if their ecological niches were different in terms of where and when they perched to prey on insects. Data are in file lizards.txt. Perches were classified by twig diameter, their height in the bush, whether the […]
Although Schoener [1968] reported four species of Anolis lizard in the paper, only two species were included in the data set. A Poisson regression does not constrain the total number of lizards in a given habitat condition, which may be misleading because the number of lizard cannot be unlimited. A different way of analyzing the […]
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