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NR 503 Week 8 Final Quiz (LATEST) 100% Correct Answers
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NR 503 Week 8 Final Quiz (LATEST) 100% Correct Answers
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NR 503 Week 8 FinalQuestion 1
Which of the following is the primary goal of epidemiology?
A) To identify the causes of diseases
B) To develop new treatment protocols
C) To provide clinical care to patients
D) To monitor laboratory test results
Answer: A) To identify the causes of diseases
Question 2
,Which measure is used to assess the frequency of a disease in a population over a
specific period of time?
A) Incidence rate
B) Prevalence rate
C) Mortality rate
D) Case fatality rate
Answer: A) Incidence rate
Question 3
In a cohort study, what is the primary difference between a cohort study and a case-
control study?
A) Cohort studies assess exposure first, while case-control studies assess outcome
first
B) Cohort studies are retrospective, while case-control studies are prospective
C) Case-control studies are more expensive than cohort studies
D) Cohort studies focus on treatment efficacy, while case-control studies focus on
exposure rates
Answer: A) Cohort studies assess exposure first, while case-control studies assess
outcome first
Question 4
What type of bias occurs when participants are selected in a way that does not
represent the general population?
A) Selection bias
B) Information bias
C) Confounding bias
D) Measurement bias
,Answer: A) Selection bias
Question 5
Which statistical test would be appropriate to determine if there is an association
between two categorical variables?
A) T-test
B) Chi-square test
C) ANOVA
D) Regression analysis
Answer: B) Chi-square test
Question 6
What is the purpose of randomization in a clinical trial?
A) To ensure that every participant gets the same treatment
B) To minimize selection bias and ensure comparability between groups
C) To make the trial more cost-effective
D) To ensure that all participants are equally aware of the study objectives
Answer: B) To minimize selection bias and ensure comparability between groups
Question 7
Which of the following is an example of a measure of central tendency?
A) Standard deviation
B) Variance
C) Mean
D) Range
, Answer: C) Mean
Question 8
The concept of “confounding” refers to:
A) A situation where the effect of one variable on an outcome is mixed up with the
effect of another variable
B) A situation where data is lost during data collection
C) A situation where study participants are not aware of their group assignment
D) A situation where a control group is not used
Answer: A) A situation where the effect of one variable on an outcome is mixed up
with the effect of another variable
Question 9
Which study design is best suited for evaluating the effectiveness of a new
medication?
A) Cross-sectional study
B) Case-control study
C) Randomized controlled trial
D) Observational cohort study
Answer: C) Randomized controlled trial
Question 10
What is the term used for the proportion of people with a disease who test positive
for that disease?
A) Sensitivity
B) Specificity
C) Positive predictive value
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