MSN Evidence-Based Practice and Research Methods 2

Question 1

Which sampling method provides the best generalizability to the target population?

Accepted Answer

Simple random sampling

Answer

Convenience sampling

Answer

Purposive sampling

Answer

Snowball sampling

Question 2

In a randomized controlled trial, blinding is used primarily to reduce which type of bias?

Accepted Answer

Performance and detection bias

Answer

Sampling bias

Answer

Attrition bias

Answer

Publication bias

Question 3

A nurse practitioner implements a quality improvement project using the PDSA cycle. What does PDSA stand for?

Accepted Answer

Plan, Do, Study, Act

Answer

Plan, Develop, Study, Assess

Answer

Propose, Design, Survey, Analyze

Answer

Prepare, Deploy, Sustain, Adapt

Question 4

Which level of measurement allows calculation of a meaningful zero point, permitting ratio comparisons?

Accepted Answer

Ratio

Answer

Nominal

Answer

Ordinal

Answer

Interval

Question 5

Forest plots in a meta-analysis display confidence intervals for each study. What does it mean when a confidence interval crosses the line of no effect?

Accepted Answer

The result is not statistically significant at the chosen alpha level

Answer

The result is statistically significant

Answer

The study had insufficient internal validity

Answer

The effect size is clinically negligible

Question 6

Which qualitative research method involves studying a group's culture and practices through immersive observation and interviews?

Accepted Answer

Ethnography

Answer

Phenomenology

Answer

Grounded theory

Answer

Content analysis