In a national survey conducted by the Centers for Disease Control to determine college students’ health-risk behaviors, college students were asked, “How often do you wear a seatbelt when driving a car?” The frequencies appear in the following table:

Response ........Frequency

Never ........ 118

Rarely ........ 249

Sometimes ..... 345

Most of the time .... 716

Always ........3093

(a) Construct a probability model for seatbelt use by a driver.

(b) Is it unusual for a college student to never wear a seatbelt when driving a car? Why?