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PART I: Choose and circle the correct/best/appropriate options (Multiple-ChoiceQuestions). (160 points--5 pts each)1-4: Scores on an exam (out of 100 points) given in a large
PART I: Choose and circle the correct/best/appropriate options (Multiple-ChoiceQuestions). (160 points--5 pts each)1-4: Scores on an exam (out of 100 points) given in a large introductory statistics course aredisplayed in the provided histogram. 1. Which best describes the shape of the distribution of exam scores? A) Approximately symmetric B) Skewed to the left C) Skewed to the right D) None 2. Based on the histogram, which value is likely the mean exam score? A) 82 B) 88 C) 76 D) 92 3. Based on the histogram of exam scores, which value is likely the median exam score? A) 92 B) 88 C) 82 D) 72 4. Based on the histogram, the standard deviation of the exam scores is likely closest towhich of these values? A) 0.5 B) 10 C) 5 D) 1 Page 3 of 17 5. A sample of size 46 with a mean of 13.6 is to be used to construct a confidence intervalfor . A bootstrap distribution based on 1,000 samples is created. Where will thebootstrap distribution be centered? A) 46 B) 13.6 C) D) 1,000 6. The average SAT-Critical Reading score for college bound students taking the exam inthe 2009-2010 academic year was 501. A highly selective university wants to know iftheir 2010 incoming class had an average SAT-Critical Reading score that was higherthan the national average. Which of the following possible samples provides the mostevidence for this claim? A) Sample A B) Sample B C) Sample C D) Sample D 7. Using a significance level of 5%, the appropriate conclusion for a test with a p-value of0.0421 would be: A) Reject Ho B) Do not Reject HO C) Indeterminate 8. It is believed that about 37% of college students binge drink (5 or more drinks for men,and 4 or more drinks for women, in two hours). Administrators at a small university of6,000 students want to do a study to determine if the proportion of their students whobinge drink differs from 37%. They select a sample of 98 students enrolled at theuniversity to survey about their drinking behavior. When generating the randomizationdistribution for this test, how large should each individual randomization sample be? A) 98 because that is the size of the original sample B) 1,000 to get an accurate randomization distribution C) 6,000 because that is the size of the university D) 2,220 because that is 37% of the students at the university Page 4 of 17 9. Which of the following samples provides the most evidence that the amount of time spentstudying for an exam and the grade on the exam are positively correlated? A) Sample A B) Sample B C) Sample C D) Sample D
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