Final Exam

Final Exam - COURSES > EPIDEMIOLOGY FALL 2006 > EXAMS >...

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COURSES > EPIDEMIOLOGY FALL 2006 > EXAMS > TAKE ASSESSMENT FINAL EXAM Take Assessment Final Exam Name: Final Exam Instructions: Multiple Attempts: Not allowed. This Test can only be taken once. Force Completion: This Test must be completed now. It cannot be resumed later. Question Completion Status: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 Question 1 1 points Save Reliability is defined as the ability of instrument to give consistent results when measurements are repeated ability of insturment to give a true measure ability to distinguish between who has and who does not have a disease test sensitivity Question 2 1 points Save An investigator knows which subjects are in the treatment and control groups. This lack of blinding may result in investigator bias. This situation can lead to validity problems in a study. True False Question 3 1 points Save Clinical trials typically use randomization of subjects into groups which increases study validity. True False Question 4 1 points Save Phase III of clinical trials is the post-marketing phase. True False Question 5 1 points Save Calculating numbers needed to treat is a good method to evaluate clinical trials
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True False Question 6 1 points Save The positive predictive value of a lab test is 44%. This means that when an individual test result is positive there is only a 44% chance that the patient has the disease. True False Question 7 4 points Save Match B. measures test's ability to identify correctly all screened individuals who actually have the disease A. measures test's ability to identify correctly who does not have a disease. D. What % of patients with positive results have the diesese? C. What % of patients with negative results are truly negative? A. specificity B. sensitivity C. negative predictive value D. positive predictive value Question 8 1 points Save Predictive value of a test is highly affected by prevalence of disease True False Question 9 1 points Save False positives may require further testing thus are expensive. True False Question 10 1 points Save Absolute Risk Reduction = Rate untreated - Rated treated. True False Question 11 1 points Save Type I error is when treatments are different but statistical analysis concludes that they are the same. True False Question 12 1 points Save It is important to determine the sample size prior to starting a clinical trial to reduce the
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likelihood of a Type II stats error. True False Question 13 1 points Save Selective screening is most likely to result in the greatest yield of true cases and is the most economical method of screening. True
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Final Exam - COURSES > EPIDEMIOLOGY FALL 2006 > EXAMS >...

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