zr: occipitofrontal head circumference data
Description
OFC data for singleton live births with gestational age at least 38 weeks in city "R" and county "Z".format
A data frame with three variables.
lll{
Sex character 'male' or 'female'
Region character city "R" or county "Z".
Head numeric head size.
}References
Wang, B. and Wertelecki, W. (2012)
Density Estimation for Data With Rounding Errors.
Computational Statistics and Data Analysis,
(in press), doi: 10.1016/j.csda.2012.02.016.