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# 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.”

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 < ___