VCU STAT 210  Test 6 Practice Test #2 (4 pages)
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Test 6 Practice Test #2
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 4
 School:
 Virginia Commonwealth University
 Course:
 Stat 210  Basic Practice of Statistics
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Test 6 Practice Test 2 1 In the current chapter covering statistical inferences on means all of the procedures we have discussed sampling distributions confidence intervals and statistical tests have involved two assumptions What are those two assumptions 2 What is the point estimate of the population mean A Z B X C 0 D s E t F p 3 On November 4 2014 polling locations throughout the United States were open for midterm elections All members of the US House of Representatives were elected as were many US Senators state governors and other local officials Voter turnout for midterm elections is usually smaller than when there is a Presidential election and of interest is the mean amount of time it takes an eligible voter to complete the voting process defined to be the time from entering the voting location to exiting the voting location during a midterm election It is conjectured that the mean amount of time that it takes all eligible voters to complete the voting process during a midterm election is 12 minutes and of interest is to test this conjecture versus the alternative that the mean amount of time that it takes all eligible voters to complete the voting process during a midterm election is different from 12 minutes State the appropriate null and alternative hypotheses that should be tested 4 Consider the information and hypotheses specified in question 3 A simple random sample of 81 eligible voters was selected and the time it took each to complete the voting process was recorded The mean amount of time for this sample of 81 eligible voters to complete the voting process was 10 8 minutes with a standard deviation of 4 1 minutes The distribution of the data was skewed to the right If appropriate use this information to test the hypotheses stated in question 3 at the 10 level of significance 5 In the Commonwealth of Virginia the 7 th congressional district covers much of central Virginia and Dave Brat defeated Jack Trammell to become a new member of the House of
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