all on the picture :) 8.37 Seat belt use. A study in El Paso, Texas, looked at seat belt use by drivers. Driverswere observed at randomly chosen convenience stores. After they left their cars, theywere invited to answer questions that included questions about seat belt use. In all,75% said they always used seat belts, yet only 61.5% were wearing seat belts whenthey pulled into the store parking lots.¹7 Explain the reason for the bias observed inresponses to the survey. Do you expect bias in the same direction in most surveysabout seat belt use?120 students

Answered: 8.37 Seat belt use. A study in El Paso,…

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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Question

all on the picture :)

8.37 Seat belt use. A study in El Paso, Texas, looked at seat belt use by drivers. Drivers
were observed at randomly chosen convenience stores. After they left their cars, they
were invited to answer questions that included questions about seat belt use. In all,
75% said they always used seat belts, yet only 61.5% were wearing seat belts when
they pulled into the store parking lots.¹7 Explain the reason for the bias observed in
responses to the survey. Do you expect bias in the same direction in most surveys
about seat belt use?
120 students

Expert Solution

Step 1

Given:

A study conducted in El Paso, Texas, examined seat belt use by drivers. Drivers were observed at a randomly selected convenience store. They were asked to answer questions about wearing seat belts after getting out of their cars. Although 75% of respondents indicated that they always wear a seat belt, only 61.5% did so when stopped in a store parking lot.

We use:

A simple random sample (SRS) of size n consists of N people selected from the population and has equal probability of being the truly selected sample.