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

Explanation:

Step1: Calculate the total number of responses

$$\begin{align*} \text{Total}&=128 + 347+529+1381+2386\\ &=4771 \end{align*}$$

Step2: Calculate the probability for "Always"

The probability formula is \(P=\frac{\text{Frequency}}{\text{Total}}\). For "Always", the frequency is \(2386\).

$$ P(\text{Always})=\frac{2386}{4771}\approx0.500 $$

Answer:

The probability for "Always" is approximately \(0.500\)