In a national survey college students were asked, "How often do you wear a seat belt when riding in a car driven by someone else?"

The response frequencies appear in the table below

(a) Construct a probability model for seat-belt use by a passenger.

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

Response Frequency Never 142 Rarely 346 Sometimes 591 Most of the time 1376 Always 2358

Never Probability =

Rarely Probablity =

Sometimes Probability =

Most of the time Probablity =

Always Probablity =