02 Jul Statistics Assignment
1. A random poll of 1,250 Tennesseans finds that 67% of respondents support some form of public railway transportation between Nashville and Clarksville. Answer the following:
a. What is the 95% margin of error?
b. Explain what this margin of error tells us in relation to the percentage of respondents who support Nashville-Clarksville public transportation.
2. A random poll of 550 Clarksvillians finds that 89% of respondents support some form of public railway transportation between Nashville and Clarksville. Answer the following:
a. What is the 95% margin of error?
b. Explain what this margin of error tells us in relation to the percentage of respondents who support Nashville-Clarksville public transportation.
3. The table below gives the breakdown of Americans (in a recent Pew Research poll) who think that U.S. anti-terrorism policies “have gone too far in restricting civil liberties” vs. those who think “anti-terrorism policies haven’t gone far enough.”
| Anti-terrorism.. | Republicans | Democrats | Independents | All |
| “Too far in restricting civil liberties” |
22% |
38% |
44% |
33% |
| “Haven’t gone far enough” | 68% | 46% | 40% | 49% |
a. What is the probability that any American queried on this question answers that anti-terrorism policies have gone too far in restricting civil liberties?
b. What is the probability that a Republican thinks that anti-terrorism policies have gone too far in restricting civil liberties?
c. What is the probability that a Democrat thinks that anti-terrorism policies haven’t gone far enough?
4. Probability values associated with significance tests tend to be associated with symbols that act as a shorthand. Denote the typical probability value associated with each of the following symbols.
a. *** p < ___
b. ** p < ___
c. * p < ___
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