The presidential election is coming. Five survey companies (A, B, C, D, and E) are doing survey to forecast whether or not the Republican candidate will win the election. Each company randomly selects a sample size between 1000 and 1500 people. All of these five companies interview people over the phone during Tuesday and Wednesday. The interviewee will be asked if he or she is 18 years old or above and U.S. citizen who are registered to vote. If yes, the interviewee will be further asked: will you vote for the Republican candidate? On Thursday morning, these five companies announce their survey sample and results at the same time on the newspapers. The results show that a% (from A), b% (from B), c% (from C), d% (from D), and e% (from E) will support the Republican candidate. The margin of error is plus/minus 3% for all results. Suppose that c > a >d >e > b. When you see these results from the newspapers, can you exactly identify which result(s) is (are) not reliable and not accurate? That is, can you identify which estimation interval(s) does (do) not include the true population proportion? If you can, explain why you can; if no, explain why you cannot and what information you need to identify. Discuss and explain your reasons. You must provide your statistical analysis and reasons.
The presidential election is coming. Five survey companies (A, B, C, D, and E) are doing survey to forecast whether or not the Republican candidate will win the election. Each company randomly selects a sample size between 1000 and 1500 people. All of these five companies interview people over the phone during Tuesday and Wednesday. The interviewee will be asked if he or she is 18 years old or above and U.S. citizen who are registered to vote. If yes, the interviewee will be further asked: will you vote for the Republican candidate? On Thursday morning, these five companies announce their survey sample and results at the same time on the newspapers. The results show that a% (from A), b% (from B), c% (from C), d% (from D), and e% (from E) will support the Republican candidate. The margin of error is plus/minus 3% for all results. Suppose that c > a >d >e > b. When you see these results from the newspapers, can you exactly identify which result(s) is (are) not reliable and not accurate? That is, can you identify which estimation interval(s) does (do) not include the true population proportion? If you can, explain why you can; if no, explain why you cannot and what information you need to identify. Discuss and explain your reasons. You must provide your statistical analysis and reasons.
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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Transcribed Image Text:The presidential election is coming. Five survey companies (A, B, C, D, and E) are doing survey to
forecast whether or not the Republican candidate will win the election. Each company randomly
selects a sample size between 1000 and 1500 people. All of these five companies interview people
over the phone during Tuesday and Wednesday. The interviewee will be asked if he or she is 18 years
old or above and U.S. citizen who are registered to vote. If yes, the interviewee will be further asked:
will you vote for the Republican candidate? On Thursday morning, these five companies announce
their survey sample and results at the same time on the newspapers. The results show that a% (from
A), b% (from B), c% (from C), d% (from D), and e% (from E) will support the Republican candidate. The
margin of error is plus/minus 3% for all results. Suppose that c > a >d >e > b. When you see these
results from the newspapers, can you exactly identify which result(s) is (are) not reliable and not
accurate? That is, can you identify which estimation interval(s) does (do) not include the true
population proportion? If you can, explain why you can; if no, explain why you cannot and what
information you need to identify. Discuss and explain your reasons. You must provide your statistical
analysis and reasons.
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