Log-transformed lead concentrations (\(\mu\)g/L) at two background and four compliance wells (four monthly samples for each well).
EPA.89b.loglead.df
A data frame with 24 observations on the following 4 variables.
LogLead
Natural logarithm of lead concentrations (\(\mu\)g/L)
Month
a factor indicating the month of collection
Well
a factor indicating the well number
Well.type
a factor indicating the well type (background vs. compliance)