Fars dataset.Safety devices may be airbags or seatbelts. For airbags, alternatives are to use ‘airbag installed’ or ‘airbag deployed’ as the criterion. Ratio of driver deaths to passenger deaths are calculated for driver with device and for driver without device, in both cases for passenger without device, and the ratio of these ratios calculated.
tabFarsDead(dset=gamclass::FARS, fatal = 4,
restrict=expression(age>=16&ageA list with elements
a multiway table with margins yrs,
airbagAvail, and a third margin with levels
P_injury, D_injury, tot, and prop
a multiway table with margins yrs,
airbagDeploy, and a third margin with levels
P_injury, D_injury, tot, and prop
a multiway table with margins yrs,
Restraint, and a third margin injury with levels
P_injury, D_injury, tot, and prop
data frame containing data
numeric: 4 for fatal injury, or c(3,4) for incapacitating or
fatal injury
Vector of character: ratio of rates variables that will be tabulated
Expression restricting values as specified
John Maindonald
Note that the ‘airbag deployed’ statistic is not a useful measure of airbag effectiveness. At its most effective, the airbag will deploy only when the accident is sufficiently serious that deployment will reduce the risk of serious injury and/or accident. The with/without deployment comparison compares, in part, serious accidents with less serious accidents.