Description Usage Format Source Examples
Trace metals in drinking water affect the flavor and an unusually high concentration can pose a health hazard. Ten pairs of data were taken measuring zinc concentration in bottom water and surface water.
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A data frame with 10 observations on the following 4 variables.
location
sample number
bottom
zinc concentration in bottom water
surface
zinc concentration in surface water
difference
difference between zinc concentration at the bottom and surface
PennState Eberly College of Science Online Courses
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