# Question

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 riding in a car driven by someone else?” The frequencies appear in the following table:

Response ..... Frequency

Never ........ 125

Rarely ........ 324

Sometimes .... . 552

Most of the time .. 1257

Always ........ 2518

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

(b) Would you consider it unusual to ﬁnd a college student who never wears a seatbelt when riding in a car driven by someone else? Why?

Response ..... Frequency

Never ........ 125

Rarely ........ 324

Sometimes .... . 552

Most of the time .. 1257

Always ........ 2518

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

(b) Would you consider it unusual to ﬁnd a college student who never wears a seatbelt when riding in a car driven by someone else? Why?

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