Project #36782 - unit 6 FR

Directions: Complete the assignment on this paper. If you need additional paper make sure that you clearly label each page with your name. Your answers for this assignment must include reasons; simply stating the answer without justification will earn partial credit. 

 

1.A recent estimate by a large distributor of gasoline claims that 60% of all cars stopping at their service stations chose unleaded gas and that super unleaded and regular were each selected 20% of the time.  In order to check the validity of these proportions, a study was conducted of cars stopping at the distributor's service stations in a large city.  The results were as follows: 

 

              Gasoline Selected

  Regular Unleaded  Super Unleaded

     51          261                  88

 

      Carry out a significance test of the distributor’s claim (16 points)

 

 

 

 

 

 

 

 

 

 

 

2.The nonprofit group Public Agenda conducted telephone interviews with three randomly selected groups of parents of high-school children.  There were 202 black parents, 202 Hispanic parents, and 201 white parents.  The sample survey asked the parents to respond to the statement, “A college education has become as important as a high school diploma used to be."  Here are the counts of responses:

 

 

Write a brief report on the similarities or differences among the three groups of parents in their attitudes towards the importance of a college education.  Include a graph or graphs and a test of significance. (18 points)

 

 

 

 

3.In a telephone survey of 800 registered voters, the data are cross classified both by gender of respondent and by respondent’s opinion on an environmental bond issue.

 

  Bond issue

ForAgainst

Men   450150

Women160        40   

 

 

We want to know whether there is good evidence that one’s gender influences whether a person is for or against the bond issue.  Use the chi-square test to answer this question.  State the hypotheses, discuss conditions, perform calculations, and report your conclusions. (18 points)

Subject Mathematics
Due By (Pacific Time) 07/30/2014 09:00 pm
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