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 0.024 (round to the nearest thousandth as needed.) rarely 0.075 (round to the nearest thousandth as needed.) sometimes (round to the nearest thousandth as needed.)

Explanation:

Step1: Calculate total frequency

$108 + 338+574 + 1129+2373=4522$

Step2: Calculate probability for 'Sometimes'

The probability $P$ of an event is given by $P=\frac{\text{Frequency of the event}}{\text{Total frequency}}$. For 'Sometimes' with frequency $574$, $P=\frac{574}{4522}\approx0.127$

Answer:

0.127