1|Page
NURS 302 Final Exam 2025/2026 Updated Version Questions
And Correct Verified Answers
Quasi (case control) - CORRECT ANSWER-Level 3 Experimental
26
design
- Intervention group - Testing a mindfulness intervention in
20
pregnant women who smoke
- Due to ethical considerations - you cannot randomize and
make people don't smoke or smoke
ly
- Still have intervention - But no randomization
Ju
7 Most Frequently Used True Experimental Designs or RCTs -
ng
CORRECT ANSWER-·Two-group RCT with pretest/posttest design
·Two-group RCT with posttest-only design
si
·Two-group RCT with repeated measures
ur
·Two-group RCT with control group receiving no intervention
·Three-group RCT
N
·Solomon four-group design (strength: isolate bias)
,2|Page
·Factorial design. (Why would I choose this design? What am I looking for?)
look at pictures on week 9 slides for characteristics of RCTs -CORRECT
ANSWER-im going to look now
26
Know threats to internal validity (was the study carried out well?) - CORRECT
20
ANSWER-- History: Results that occur from an event or organizational
intervention unrelated to the study intervention (e.g. Cdiff outbreak and
handwashing practice)
ly
Ju
Maturation: Results occurring from developmental change that occurs
independent of the study treatment; usually occurs gradually (e.g. speech
g
development)
in
Repeating testing/practice effects: Results occurring from practice
s
with testing or repeated exposure to the same measurement instruments
ur
N
Attrition: Most often encountered in repeated measure testing,
effect could be due to dropout of sickness or least interested/motivated
, 3|Page
Know attrition and how to calculate and consider attrition rate when
determining sample size - CORRECT ANSWER-- Attrition:Most often
encountered in repeated measure testing, effect could be due to
26
dropout of sickness or least interested/motivated
200 people in the study with 10% attrition rate. How many people
20
should include in the study?
200+20=220
ly
why does attrition happen - CORRECT ANSWER-- Personal
Ju
circumstances
- Lose of interest
ng
- Time constraints
- Dissatisfaction with study protocol
si
- Adverse effects
ur
why consider attrition - CORRECT ANSWER-- Can introduce bias if the
N
characteristics of participants who drop out differ from those who
continue to participate
, 6|Page
What is the difference between clinical significance and
statistical significance? - CORRECT ANSWER-- Statistical
significance Is the difference between the mean of the 2variables
-Statistical significance indicates the reliability of the study results
26
-Clinical significance reflects its impact on clinical practice
20
What is a power analysis and why is it done? - CORRECT ANSWER-
Determines what sample size needed to detect a significant difference
ly
between intervention and control groups
Ju
type 1 error - CORRECT ANSWER-Rejecting null hypothesis when it
is true (false positive)
g
in
type 2 error - CORRECT ANSWER-failing to reject a false null
s
hypothesis (too small of sample size)
ur
False negative
N
NURS 302 Final Exam 2025/2026 Updated Version Questions
And Correct Verified Answers
Quasi (case control) - CORRECT ANSWER-Level 3 Experimental
26
design
- Intervention group - Testing a mindfulness intervention in
20
pregnant women who smoke
- Due to ethical considerations - you cannot randomize and
make people don't smoke or smoke
ly
- Still have intervention - But no randomization
Ju
7 Most Frequently Used True Experimental Designs or RCTs -
ng
CORRECT ANSWER-·Two-group RCT with pretest/posttest design
·Two-group RCT with posttest-only design
si
·Two-group RCT with repeated measures
ur
·Two-group RCT with control group receiving no intervention
·Three-group RCT
N
·Solomon four-group design (strength: isolate bias)
,2|Page
·Factorial design. (Why would I choose this design? What am I looking for?)
look at pictures on week 9 slides for characteristics of RCTs -CORRECT
ANSWER-im going to look now
26
Know threats to internal validity (was the study carried out well?) - CORRECT
20
ANSWER-- History: Results that occur from an event or organizational
intervention unrelated to the study intervention (e.g. Cdiff outbreak and
handwashing practice)
ly
Ju
Maturation: Results occurring from developmental change that occurs
independent of the study treatment; usually occurs gradually (e.g. speech
g
development)
in
Repeating testing/practice effects: Results occurring from practice
s
with testing or repeated exposure to the same measurement instruments
ur
N
Attrition: Most often encountered in repeated measure testing,
effect could be due to dropout of sickness or least interested/motivated
, 3|Page
Know attrition and how to calculate and consider attrition rate when
determining sample size - CORRECT ANSWER-- Attrition:Most often
encountered in repeated measure testing, effect could be due to
26
dropout of sickness or least interested/motivated
200 people in the study with 10% attrition rate. How many people
20
should include in the study?
200+20=220
ly
why does attrition happen - CORRECT ANSWER-- Personal
Ju
circumstances
- Lose of interest
ng
- Time constraints
- Dissatisfaction with study protocol
si
- Adverse effects
ur
why consider attrition - CORRECT ANSWER-- Can introduce bias if the
N
characteristics of participants who drop out differ from those who
continue to participate
, 6|Page
What is the difference between clinical significance and
statistical significance? - CORRECT ANSWER-- Statistical
significance Is the difference between the mean of the 2variables
-Statistical significance indicates the reliability of the study results
26
-Clinical significance reflects its impact on clinical practice
20
What is a power analysis and why is it done? - CORRECT ANSWER-
Determines what sample size needed to detect a significant difference
ly
between intervention and control groups
Ju
type 1 error - CORRECT ANSWER-Rejecting null hypothesis when it
is true (false positive)
g
in
type 2 error - CORRECT ANSWER-failing to reject a false null
s
hypothesis (too small of sample size)
ur
False negative
N
