The data set ”airquality” in the R datasets library has data on
ozone concentration, wind speed, temperature, and solar radiation
by month and day for May through September in New York. Attach
airquality to your workspace and then construct side-by-side
boxplots of Wind by Month. Month is a numeric variable in the
airquality data frame. You can treat it as a factor by using the
”as.factor” function, e.g.,
> plot(Wind ∼ as.factor(Month))
Next, do an analysis of variance to determine...