The data in Table 8.3 as part of a preliminary study of a possible link between football helmet design and neck injuries.
table8.3A dataframe with 90 rows and 7 columns.
high school football players (group 1), college football players (group 2), and nonfootball players (group 3)
head width at widest dimension
head circumference
front-to-back measurement at eye level
eye-to-top-of-head measurement
ear-to-top-of-head measurement
jaw width