VCU STAT 210 - Test 1 Practice Test #1 (3 pages)

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Test 1 Practice Test #1



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Test 1 Practice Test #1

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3
School:
Virginia Commonwealth University
Course:
Stat 210 - Basic Practice of Statistics
Basic Practice of Statistics Documents
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Test 1 Practice Test 1 Robert Francis Bob McDonnell born June 15 1954 is a Republican politician and was the 71st Governor of Virginia McDonnell served on the executive committee of the Republican Governors Association was a lieutenant colonel in the United States Army served in the Virginia House of Delegates from 1992 to 2006 and was Attorney General of Virginia from 2006 to 2009 McDonnell was elected Governor of Virginia after using the campaign slogan Bob s for Jobs He defeated Democratic state Senator Creigh Deeds by a 17 point margin in the 2009 general election which was marked by the severe recession of the late 2000s The state s unemployment rate declined from 7 4 in January 2010 when McDonnell took office to 5 2 in December 2013 comparable to the decline in the national unemployment rate from 9 8 to 6 7 during the same period McDonnell s governorship ended with a 55 to 32 approval to disapproval rating among registered voters On January 21 2014 McDonnell and his wife Maureen were indicted on federal corruption charges edited from Wikipedia 1 During July and August of 2014 Bob and Maureen McDonnell have been on trial defending themselves of federal corruption charges Of interest is to determine the proportion of all current eligible voters in the Commonwealth of Virginia who feel Bob and Maureen McDonnell are guilty of the charges made against them Based on this information what is the population of interest 2 Based on the information in question 1 what is the parameter of interest 3 A sample of 798 current eligible voters in the Commonwealth of Virginia was selected and each voter was asked whether they were aware of the trial involving Bob and Maureen McDonnell In this sample 686 voters or approximately 86 indicated that they were aware of the trial In this scenario is 86 an example of a parameter or a statistic A Parameter B Statistic 4 To select the sample described in question 3 the following was done The Commonwealth of Virginia is divided into 95 counties and 38 independent cities For each of these 133 counties and cities six current eligible voters were randomly selected and asked whether they were aware of the trial involving Bob and Maureen McDonnell Each responded either Yes or No What type of sampling procedure is this an example of A Volunteer response sampling B Simple random sampling C Haphazard sampling D Multistage random sampling E Stratified random sampling 5 Consider the information in question 3 and the sampling procedure described in question 4 Suppose that out of the 798 current eligible voters in the Commonwealth of Virginia selected for the sample 56 voters living in southwest Virginia either could not be contacted or refused to answer What type of bias could this cause A Selection bias B Response bias C Nonresponse bias D Confounding bias 6 The statement from Wikipedia mentions that the unemployment rate in the Commonwealth of Virginia declined from 7 4 in January 2010 when McDonnell took office to 5 2 in December 2013 comparable to the decline in the national unemployment rate from 9 8 to 6 7 during the same period For a given period of time the unemployment rate for each of the 50 states is what type of characteristic A Categorical variable B Discrete quantitative variable C Continuous quantitative variable D Constant 7 Bob McDonnell was a Republican when elected to office Suppose that the 798 current eligible voters in the Commonwealth of Virginia who make up the sample were asked their political affiliation The possible responses were Republican Democrat Independent and other or no preference In this scenario the political party affiliation of each eligible voter is what type of characteristic A Categorical variable B Discrete quantitative variable C Continuous quantitative variable D Constant 8 The prosecution has a list of 61 witnesses that it plans to call in the corruption trial of Bob and Maureen McDonnell Of interest is to determine the mean amount of time that each witness spent on the witness stand In this scenario what is the population of interest 9 Based on the information in question 8 what is the parameter of interest 10 Consider the information presented in question 8 What type of characteristic is mean amount of time that each witness spent on the witness stand A Categorical variable B Discrete quantitative variable C Continuous quantitative variable D Constant 11 Each day of the trial the number of witnesses that testified that day was recorded What type of characteristic is the number of witnesses that testified each day A Categorical variable B Discrete quantitative variable C Continuous quantitative variable D Constant 12 Of interest is to select a sample of 12 of the 61 prosecution witnesses Which of the following is the best way to select the sample of 12 witnesses A Label all witnesses using two digit numbers from 01 to 61 and then use a table of random digits to select 12 two digit numbers between 01 and 61 Match the numbers selected to the appropriate witnesses and these become the 12 witnesses in the sample B On August 13 director Stephen Spielberg was mentioned during testimony at the trial Give tickets to the next Spielberg movie to the first 12 witnesses who volunteer C Label all witnesses with two digit numbers from 01 to 12 and then use a table of random digits to select 12 two digit numbers between 01 and 12 D It has been determined that 12 witnesses have spent at least one night at the Jefferson Hotel Choose these 12 witnesses to become the sample 13 A study of the witness list reveals that 6 of the 61 prosecution witnesses are immediate family of former Governor Bob McDonnell In this scenario is 6 an example of a parameter or a statistic A Parameter B Statistic 14 Suppose a sample of 30 witnesses was selected and each was asked whether they had ever spent a night at the Governor s mansion Due to the seriousness of the charges and the potential negativity associated with admitting that they had stayed at the Governor s mansion some witnesses who had stayed at the mansion responded no and hence their responses were not accurate In this scenario what type of bias could this cause A Selection bias B Response bias C Nonresponse bias D Confounding bias 15 A fake treatment given to the experimental units in the control group which hopefully prevents them from knowing if they received the treatment or not is referred to as which of the following A Blinding B Response C Replication D Placebo E Confounding 16 Five


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