n 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 Never 110 Rarely 333 Sometimes 561 Most of the time 1081 Always 2233 (a) Complete the table below. Response Probability Never nothing (Round to the nearest thousandth as needed.) Rarely nothing (Round to the nearest thousandth as needed.) Sometimes nothing (Round to the nearest thousandth as needed.) Most of the time nothing (Round to the nearest thousandth as needed.) Always nothing (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? A. No, because the probability of an unusual event is 0. B. Yes, because 0.01<P(never)<0.10. C. No, because there were 110 people in the survey who said they never wear their seat belt. D. Yes, because P(never)<0.05.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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n 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
Never	110
Rarely	333
Sometimes	561
Most of the time	1081
Always	2233

(a) Complete the table below.

Response	Probability
Never	nothing	(Round to the nearest thousandth as needed.)

Rarely

nothing

(Round to the nearest thousandth as needed.)

Sometimes

nothing

(Round to the nearest thousandth as needed.)

Most of the time

nothing

(Round to the nearest thousandth as needed.)

Always

nothing

(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?

No, because the probability of an unusual event is 0.

Yes, because

0.01<P(never)<0.10.

No, because there were

110

people in the survey who said they never wear their seat belt.

Yes, because

P(never)<0.05.

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