Question

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 to the right. (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? (a) complete the table below. response probability never 0.028 (round to the nearest thousandth as needed.) rarely (round to the nearest thousandth as needed.)

Explanation:

Step1: Calculate total frequency

$135 + 308+560 + 1233+2431=4667$

Step2: Calculate probability for 'Rarely'

The probability $P$ of an event is given by $P=\frac{\text{Frequency of the event}}{\text{Total frequency}}$. For 'Rarely', the frequency is 308. So $P=\frac{308}{4667}\approx0.066$

Answer:

0.066