Table 1.

Means and standard deviation for personal seat belt use and perceived norms for seat belt use^a

Variable	N	Mean	SD
How often do you wear your seat belt …
When you ride/drive on the highway?	3333	5.05	1.66
On short trips in town?	3332	4.65	1.82
When you are in a vehicle with family members?	3335	5.05	1.59
When you are in a vehicle with friends?	3334	4.71	1.77
When you ride in the front passenger seat?	3335	5.09	1.56
When you ride as a passenger in the back seat?	3336	4.46	1.88
Personal seat belt use composite	3338	4.83	1.51
What percentage of__________ do you think regularly wear their seat belts?
Students in your school	3314	3.68	1.20
Male students	3314	3.22	1.31
Female students	3312	3.96	1.29

^aValues of 3, 4, and 5 correspond to 25–49 percent, 50–74 percent, and 75–94 percent, respectively.