Description Format Source References Examples
Seasonal variation in chloride level in marshes close to a road or distant from the road, in Minnesota.
A data frame with 32 observations on the following 4 variables.
March number
a factor with levels Isolated
and Roadside
Month (4 = May, ... 10 = October)
Chloride concentration, mg/liter
Stefanie Miklovic and Susan Galatowitsch
Weisberg, S. (2005). Applied Linnear Regression, 3rd edition. New York: Wiley, Section 6.5.
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