An environmental survey contained a question asking what respondents thought was the major cause of air pollution in this country, giving the choices "automobiles," "factories," and "incinerators." Two versions of the test, A and B, were used. Let pa and Pg be the respective proportions of people using forms A and B who select "factories." If 170 out of 460 people who used version A chose "factories" and 141 out of 440 people who used version B chose "factories," (a) Find a 95% confidence interval for PA - PB: (b) Do the versions seem to be consistent concerning this answer? Why or why not?

An environmental survey contained a question asking what respondents thought was the major cause of air pollution in this country, giving the choices "automobiles," "factories," and "incinerators." Two versions of the test, A and B, were used. Let pa and Pg be the respective proportions of people using forms A and B who select "factories." If 170 out of 460 people who used version A chose "factories" and 141 out of 440 people who used version B chose "factories," (a) Find a 95% confidence interval for PA - PB: (b) Do the versions seem to be consistent concerning this answer? Why or why not?

Name: An environmental survey contained aquestion asking what respondentsth
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Description: An environmental survey contained aquestion asking what respondentsthought was the major cause of airpollution in this country, giving thechoices "automobiles," "factories," and"incinerators." Two versions of thetest, A and B, were used. Let pa andP

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 6E

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