The NHANES package contains two version of a data set
from the US National Health and Nutrition Examination Study.
NHANESraw contains data from the NHANES website,
recoded to make it easier to work with in R.NHANES contains a resampled version of this that takes
into account the sampling scheme employed. The resulting data set is a
reasonable approxiamtion to a simple random sample fron the US
population.See the help pages for the data sets for more details.