NR 503/NR503 WEEK 4
FINAL EXAM 200
QUESTIONS WITH VERIFIED
SOLUTIONS/A+ GRADE
1. Which study design is best for determining incidence rates of disease?
Answer: Cohort study
2. What type of variable is “blood type”?
Answer: Nominal
3. The number of new cases of a disease in a specific time period is called:
Answer: Incidence
4. Which statistical test compares means between two independent groups?
Answer: Independent t-test
5. Which level of prevention includes screening for hypertension?
Answer: Secondary prevention
6. What is the purpose of randomization in a clinical trial?
Answer: To reduce selection bias
7. In a case-control study, participants are selected based on:
Answer: Disease status
8. Which term refers to the consistency or reproducibility of a measurement?
Answer: Reliability
, 9. What is the best graphical representation of categorical data?
Answer: Bar chart
10. The null hypothesis typically states that:
Answer: There is no difference between groups
11. Which epidemiologic measure is used in cohort studies to compare risk?
Answer: Relative Risk
12. What type of error occurs when a null hypothesis is incorrectly rejected?
Answer: Type I error
13. Which study design is most appropriate for studying rare diseases?
Answer: Case-control study
14. A p-value of 0.03 indicates:
Answer: There is a 3% probability the results are due to chance
15. Which variable type is “temperature in Celsius”?
Answer: Interval
16. Which measure of central tendency is most affected by outliers?
Answer: Mean
17. The Belmont Report includes all EXCEPT:
Answer: Confidentiality (Correct: Respect for persons, beneficence, justice)
18. The mode is defined as:
Answer: The most frequently occurring value
19. Which distribution shape has a tail on the right?
Answer: Positively skewed
20. What does a confidence interval that includes 1.0 in relative risk indicate?
Answer: The result is not statistically significant
21. When is the chi-square test used?
Answer: To test association between categorical variables
22. What is an odds ratio of 1.0 interpreted as?
Answer: No association
23. Internal validity refers to:
Answer: The extent to which the results reflect the truth in the study population
24. What is a cross-sectional study?
Answer: A study assessing exposure and outcome at the same time
FINAL EXAM 200
QUESTIONS WITH VERIFIED
SOLUTIONS/A+ GRADE
1. Which study design is best for determining incidence rates of disease?
Answer: Cohort study
2. What type of variable is “blood type”?
Answer: Nominal
3. The number of new cases of a disease in a specific time period is called:
Answer: Incidence
4. Which statistical test compares means between two independent groups?
Answer: Independent t-test
5. Which level of prevention includes screening for hypertension?
Answer: Secondary prevention
6. What is the purpose of randomization in a clinical trial?
Answer: To reduce selection bias
7. In a case-control study, participants are selected based on:
Answer: Disease status
8. Which term refers to the consistency or reproducibility of a measurement?
Answer: Reliability
, 9. What is the best graphical representation of categorical data?
Answer: Bar chart
10. The null hypothesis typically states that:
Answer: There is no difference between groups
11. Which epidemiologic measure is used in cohort studies to compare risk?
Answer: Relative Risk
12. What type of error occurs when a null hypothesis is incorrectly rejected?
Answer: Type I error
13. Which study design is most appropriate for studying rare diseases?
Answer: Case-control study
14. A p-value of 0.03 indicates:
Answer: There is a 3% probability the results are due to chance
15. Which variable type is “temperature in Celsius”?
Answer: Interval
16. Which measure of central tendency is most affected by outliers?
Answer: Mean
17. The Belmont Report includes all EXCEPT:
Answer: Confidentiality (Correct: Respect for persons, beneficence, justice)
18. The mode is defined as:
Answer: The most frequently occurring value
19. Which distribution shape has a tail on the right?
Answer: Positively skewed
20. What does a confidence interval that includes 1.0 in relative risk indicate?
Answer: The result is not statistically significant
21. When is the chi-square test used?
Answer: To test association between categorical variables
22. What is an odds ratio of 1.0 interpreted as?
Answer: No association
23. Internal validity refers to:
Answer: The extent to which the results reflect the truth in the study population
24. What is a cross-sectional study?
Answer: A study assessing exposure and outcome at the same time
