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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