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The Ex.7.7 data frame has 19 rows and 2 columns.
Ex.7.7
data(Ex.7.7)
This data frame contains the following columns:
a numeric vector, U.S. population in thousands.
a numeric vector, year.
##---- Should be DIRECTLY executable !! ---- data(Ex.7.7) with(Ex.7.7, plot(y ~ t)) summary(Ex.7.7)
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