Answered: Suppose that a safety group surveyed…

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

Suppose that a safety group surveyed

1,100

drivers. Among those surveyed,

65%

said that careless or aggressive driving was the biggest threat on the road, and

25%

said that cell phone usage by other drivers was the driving behavior that annoyed them the most. Based on these data and assuming that the sample was a simple random sample, construct and interpret a

95%

confidence interval estimate for the true proportion in the population of all drivers who are annoyed by cell phone users.

The confidence interval estimate is

??––––––??>

(Round to three decimal places as needed. Use ascending order.)

Interpret the confidence interval estimate.

There is a

0.95

probability that the population proportion of drivers who are annoyed by cell phone users is in the interval.

There is

95%

confidence that the population proportion of drivers who are annoyed by cell phone users is in the interval.

There is

95%

confidence that the population proportion of drivers who are annoyed by cell phone users is equal to one of the bounds of the interval.

There is a

0.95

probability that the sample proportion of drivers who are annoyed by cell phone users is in the interval.

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