Lawn Roller Data
The roller data frame has 10 rows and 2 columns.
Different weights of roller were rolled over different parts
of a lawn, and the depression was recorded.
roller
This data frame contains the following columns:
a numeric vector consisting of the roller weights
the depth of the depression made in the grass under the roller
Stewart, K.M., Van Toor, R.F., Crosbie, S.F. 1988. Control of grass grub (Coleoptera: Scarabaeidae) with rollers of different design. N.Z. Journal of Experimental Agriculture 16: 141-150.
plot(roller) roller.lm <- lm(depression ~ weight, data = roller) plot(roller.lm, which = 4)
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