HW 12 - HWW 12 Q1 Let p equal the proportion of Americans...

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Introduction to Probability and Statistics
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Chapter 10 / Exercise 2
Introduction to Probability and Statistics
Beaver/Mendenhall
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HWW 12Q1) Let p equal the proportion of Americans who select jogging as one of their recreational activities. If 1440 out of a random sample of 5800 selected jogging, find an approximate 98% confidence interval for p.
Q3 An environmental survey contained a question askmg 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, pB be the respective proportions of people using forms A and B who select "factories." If 170 out of 464 people who used version A chose "factories" and 141 out of 440 people who used version B chose "factories,"population APopulation Bn=464 n= 440pA-pB=0.045925p hat=0.366379 p hat=0.3204545455a/2=0.025q=0.633621 q=0.6795454545Z=1.96width=0.061833lower=-0.01591upper=0.107757Q4 The March 29, 1993, issue of Time magazine reported the proportions of adult Americans who favor "stricter gun-control laws." A telephone poll of 800 adult Americans, of whom 374 were gun owners and 426 did not own guns, showed that 205 gun owners and 315 non-gun owners favored stricter gun-control laws. Let p1, p2 be the respective proportions of gun owners and non-gun owners who favor stricter gun-control laws.(Note: please keep at least 3 significant digits in your answer.)
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Introduction to Probability and Statistics
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Chapter 10 / Exercise 2
Introduction to Probability and Statistics
Beaver/Mendenhall
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