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? Response Frequency t Never 137 Rarely Sometimes 303 555 Most of the time 1218 Always 2520 (a) Complete the table below. Response Never Probability (Round to the nearest thousandth as needed.) Rarely (Round to the nearest thousandth as needed.) Sometimes (Round to the nearest thousandth as needed.) Most of the time (Round to the nearest thousandth as needed.) Always (Round to the nearest thousandth as needed.) (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?

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### Survey on College Students' Seat-Belt Usage

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 table below shows the response frequencies.

#### Response Frequency Table

- **Never**: 137
- **Rarely**: 303
- **Sometimes**: 555
- **Most of the time**: 1218
- **Always**: 2520

#### Task (a): Complete the Probability Table

Calculate the probability for each response, rounding to the nearest thousandth.

| Response         | Probability                           |
|------------------|---------------------------------------|
| Never            | (Round to the nearest thousandth as needed.)   |
| Rarely           | (Round to the nearest thousandth as needed.)   |
| Sometimes        | (Round to the nearest thousandth as needed.)   |
| Most of the time | (Round to the nearest thousandth as needed.)   |
| Always           | (Round to the nearest thousandth as needed.)   |

#### Task (b): Consider Unusualness

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.** Yes, because P(never) < 0.05.
- **B.** Yes, because 0.01 < P(never) < 0.10.
- **C.** No, because the probability of an unusual event is 0.
- **D.** No, because there were 137 people in the survey who said they never wear their seat belt.
Transcribed Image Text:### Survey on College Students' Seat-Belt Usage 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 table below shows the response frequencies. #### Response Frequency Table - **Never**: 137 - **Rarely**: 303 - **Sometimes**: 555 - **Most of the time**: 1218 - **Always**: 2520 #### Task (a): Complete the Probability Table Calculate the probability for each response, rounding to the nearest thousandth. | Response | Probability | |------------------|---------------------------------------| | Never | (Round to the nearest thousandth as needed.) | | Rarely | (Round to the nearest thousandth as needed.) | | Sometimes | (Round to the nearest thousandth as needed.) | | Most of the time | (Round to the nearest thousandth as needed.) | | Always | (Round to the nearest thousandth as needed.) | #### Task (b): Consider Unusualness 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.** Yes, because P(never) < 0.05. - **B.** Yes, because 0.01 < P(never) < 0.10. - **C.** No, because the probability of an unusual event is 0. - **D.** No, because there were 137 people in the survey who said they never wear their seat belt.
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