NURS 5334 FINAL EXAM– QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS PLUS RATIONALES |
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1. A nurse scientist is developing a predictive model to evaluate the impact of nurse-to-
patient staffing ratios on hospital-acquired pressure injury rates. Which variable type best
describes the hospital-acquired pressure injury rate expressed as the number of events per
1,000 patient days?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
ANSWER: D. Ratio
Ratio-level data possess a true, meaningful zero point where zero represents the complete
absence of the characteristic being measured, allowing for direct comparison of magnitudes.
Interval data lack a true zero, ordinal data represent ordered categories without equal
intervals, and nominal data represent unordered categorical variables.
2. An advanced practice registered nurse is analyzing skewed data regarding length of stay
in intensive care units across multiple regional facilities. Which measure of central
tendency is most appropriate to report when data are heavily skewed?
A. Mean
B. Median
C. Mode
D. Standard deviation
ANSWER: B. Median
The median is the preferred measure of central tendency for skewed distributions because it is
resistant to extreme outliers and skewed tails. The mean is pulled significantly in the direction
of skewness, and the mode represents only the most frequent single value rather than the
center of the distribution. Standard deviation is a measure of dispersion, not central tendency.
3. A doctoral-prepared nurse researcher is planning a randomized controlled trial to
evaluate a new telemonitoring intervention for heart failure management. To minimize
selection bias and ensure baseline equivalence between the intervention and control groups,
what is the gold-standard methodological step the researcher must implement?
A. Purposive sampling of high-risk patients
,B. Random assignment of participants to study arms
C. Stratification based on patient age after data collection
D. Non-probability quota sampling
ANSWER: B. Random assignment of participants to study arms
Random assignment ensures that each participant has an equal and independent probability
of being placed in either the experimental or control group, effectively distributing known and
unknown confounding variables evenly across arms. Purposive and quota sampling are non-
probability techniques that increase selection bias, and post-hoc stratification cannot undo
baseline allocation bias.
4. A nurse leader is reviewing a study that evaluated the efficacy of a nurse-led rounding
protocol on patient fall rates. The researchers reported a p-value of 0.03. Assuming an
alpha level of 0.05, how should the nurse leader interpret this finding?
A. Accept the null hypothesis because the effect size is too small
B. Reject the null hypothesis and conclude there is a statistically significant difference in fall
rates
C. Conclude that the rounding protocol caused the reduction in falls with 97 percent certainty
D. Reject the alternative hypothesis due to insufficient statistical power
ANSWER: B. Reject the null hypothesis and conclude there is a statistically significant
difference in fall rates
A p-value less than the predetermined alpha level of 0.05 indicates that the observed sample
difference is unlikely to have occurred by chance alone, leading to the rejection of the null
hypothesis of no difference. A p-value does not measure clinical importance, causation
magnitude, or the exact probability of alternative truth.
5. A quality improvement team wants to determine if there is a linear association between
nurse communication scores on Hospital Consumer Assessment of Healthcare Providers
and Systems surveys and 30-day readmission rates. Which correlation coefficient is most
appropriate for analyzing two continuous variables?
A. Pearson correlation coefficient
B. Spearman rank-order correlation
C. Chi-square test of independence
D. Point-biserial correlation
ANSWER: A. Pearson correlation coefficient
The Pearson correlation coefficient measures the strength and direction of association
between two continuous, normally distributed variables. Spearman correlation is used for
ordinal or non-normal continuous data, chi-square evaluates categorical variables, and point-
biserial involves one continuous and one dichotomous variable.
,6. A clinical nurse specialist is designing a survey to measure patient satisfaction following
outpatient surgery using a scale ranging from strongly disagree to strongly agree. What
level of measurement does this Likert-type scale represent?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
ANSWER: B. Ordinal
Likert-type scales assign ordered ranks to categories where the relative order is known (e.g.,
strongly agree is greater than agree), but the mathematical distance between adjacent points
on the scale cannot be assumed to be equal, classifying them as ordinal data.
7. A nurse researcher wants to compare the mean blood pressure reductions across four
different antihypertensive medication regimens. Which parametric statistical test is
specifically designed to evaluate differences in means among three or more independent
groups?
A. Independent samples t-test
B. Paired t-test
C. Analysis of Variance (ANOVA)
D. Pearson Chi-Square test
ANSWER: C. Analysis of Variance (ANOVA)
Analysis of Variance (ANOVA) evaluates whether the means of three or more independent
groups differ significantly by analyzing the ratio of between-group variance to within-group
variance. Independent and paired t-tests are limited to comparing only two groups, while chi-
square is used for categorical frequency data.
8. An informatics nurse is evaluating a diagnostic screening tool for detecting early sepsis
in emergency department admissions. The tool has high sensitivity. What clinical
implication does high sensitivity provide for healthcare providers?
A. It effectively rules out the condition when the screening test result is negative.
B. It confirms the presence of disease when the test result is positive.
C. It minimizes the rate of false-positive diagnoses.
D. It measures the proportion of healthy individuals without sepsis.
ANSWER: A. It effectively rules out the condition when the screening test result is negative.
High sensitivity refers to a test's ability to correctly identify those with the disease, meaning a
negative test result is extremely reliable for ruling out the condition (SnNout). Conversely,
high specificity is used to rule in a condition with a positive result (SpPin).
, 9. A nurse researcher conducting a qualitative phenomenological study on the lived
experiences of ICU nurses during a pandemic saturation phase reaches a point where no
new conceptual insights or themes emerge from participant interviews. What
methodological milestone has been achieved?
A. Saturation
B. Triangulation
C. Member checking
D. Confirmability
ANSWER: A. Saturation
Data saturation occurs when gathering additional qualitative data yields no new thematic
insights or properties, signaling the appropriate stopping point for data collection.
Triangulation involves using multiple data sources, member checking validates findings with
participants, and confirmability addresses neutrality.
10. An advanced practice nurse is reviewing a systematic review that combines quantitative
results from multiple independent randomized controlled trials on wound healing. What
statistical technique was likely utilized to synthesize these numerical findings?
A. Meta-analysis
B. Metasynthesis
C. Content analysis
D. Narrative review
ANSWER: A. Meta-analysis
A meta-analysis is a quantitative systematic review method that pools numerical data from
multiple primary studies to calculate a combined overall effect size. Metasynthesis synthesizes
qualitative findings, content analysis categorizes text data, and a narrative review provides a
qualitative overview without formal statistical pooling.
11. A nurse manager is implementing an evidence-based practice guideline regarding
central line maintenance. Using the PICO format for the clinical question, what does the
letter 'C' represent?
A. Comparison intervention or usual care
B. Clinical context of the hospital unit
C. Cost-benefit ratio of the intervention
D. Confounding variable to be controlled
ANSWER: A. Comparison intervention or usual care
VERIFIED AND WELL DETAILED ANSWERS PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE | EXAM PREP |
STUDY GUIDE | PRACTICE TEST| DOWNLOAD INSTANT PDF
1. A nurse scientist is developing a predictive model to evaluate the impact of nurse-to-
patient staffing ratios on hospital-acquired pressure injury rates. Which variable type best
describes the hospital-acquired pressure injury rate expressed as the number of events per
1,000 patient days?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
ANSWER: D. Ratio
Ratio-level data possess a true, meaningful zero point where zero represents the complete
absence of the characteristic being measured, allowing for direct comparison of magnitudes.
Interval data lack a true zero, ordinal data represent ordered categories without equal
intervals, and nominal data represent unordered categorical variables.
2. An advanced practice registered nurse is analyzing skewed data regarding length of stay
in intensive care units across multiple regional facilities. Which measure of central
tendency is most appropriate to report when data are heavily skewed?
A. Mean
B. Median
C. Mode
D. Standard deviation
ANSWER: B. Median
The median is the preferred measure of central tendency for skewed distributions because it is
resistant to extreme outliers and skewed tails. The mean is pulled significantly in the direction
of skewness, and the mode represents only the most frequent single value rather than the
center of the distribution. Standard deviation is a measure of dispersion, not central tendency.
3. A doctoral-prepared nurse researcher is planning a randomized controlled trial to
evaluate a new telemonitoring intervention for heart failure management. To minimize
selection bias and ensure baseline equivalence between the intervention and control groups,
what is the gold-standard methodological step the researcher must implement?
A. Purposive sampling of high-risk patients
,B. Random assignment of participants to study arms
C. Stratification based on patient age after data collection
D. Non-probability quota sampling
ANSWER: B. Random assignment of participants to study arms
Random assignment ensures that each participant has an equal and independent probability
of being placed in either the experimental or control group, effectively distributing known and
unknown confounding variables evenly across arms. Purposive and quota sampling are non-
probability techniques that increase selection bias, and post-hoc stratification cannot undo
baseline allocation bias.
4. A nurse leader is reviewing a study that evaluated the efficacy of a nurse-led rounding
protocol on patient fall rates. The researchers reported a p-value of 0.03. Assuming an
alpha level of 0.05, how should the nurse leader interpret this finding?
A. Accept the null hypothesis because the effect size is too small
B. Reject the null hypothesis and conclude there is a statistically significant difference in fall
rates
C. Conclude that the rounding protocol caused the reduction in falls with 97 percent certainty
D. Reject the alternative hypothesis due to insufficient statistical power
ANSWER: B. Reject the null hypothesis and conclude there is a statistically significant
difference in fall rates
A p-value less than the predetermined alpha level of 0.05 indicates that the observed sample
difference is unlikely to have occurred by chance alone, leading to the rejection of the null
hypothesis of no difference. A p-value does not measure clinical importance, causation
magnitude, or the exact probability of alternative truth.
5. A quality improvement team wants to determine if there is a linear association between
nurse communication scores on Hospital Consumer Assessment of Healthcare Providers
and Systems surveys and 30-day readmission rates. Which correlation coefficient is most
appropriate for analyzing two continuous variables?
A. Pearson correlation coefficient
B. Spearman rank-order correlation
C. Chi-square test of independence
D. Point-biserial correlation
ANSWER: A. Pearson correlation coefficient
The Pearson correlation coefficient measures the strength and direction of association
between two continuous, normally distributed variables. Spearman correlation is used for
ordinal or non-normal continuous data, chi-square evaluates categorical variables, and point-
biserial involves one continuous and one dichotomous variable.
,6. A clinical nurse specialist is designing a survey to measure patient satisfaction following
outpatient surgery using a scale ranging from strongly disagree to strongly agree. What
level of measurement does this Likert-type scale represent?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
ANSWER: B. Ordinal
Likert-type scales assign ordered ranks to categories where the relative order is known (e.g.,
strongly agree is greater than agree), but the mathematical distance between adjacent points
on the scale cannot be assumed to be equal, classifying them as ordinal data.
7. A nurse researcher wants to compare the mean blood pressure reductions across four
different antihypertensive medication regimens. Which parametric statistical test is
specifically designed to evaluate differences in means among three or more independent
groups?
A. Independent samples t-test
B. Paired t-test
C. Analysis of Variance (ANOVA)
D. Pearson Chi-Square test
ANSWER: C. Analysis of Variance (ANOVA)
Analysis of Variance (ANOVA) evaluates whether the means of three or more independent
groups differ significantly by analyzing the ratio of between-group variance to within-group
variance. Independent and paired t-tests are limited to comparing only two groups, while chi-
square is used for categorical frequency data.
8. An informatics nurse is evaluating a diagnostic screening tool for detecting early sepsis
in emergency department admissions. The tool has high sensitivity. What clinical
implication does high sensitivity provide for healthcare providers?
A. It effectively rules out the condition when the screening test result is negative.
B. It confirms the presence of disease when the test result is positive.
C. It minimizes the rate of false-positive diagnoses.
D. It measures the proportion of healthy individuals without sepsis.
ANSWER: A. It effectively rules out the condition when the screening test result is negative.
High sensitivity refers to a test's ability to correctly identify those with the disease, meaning a
negative test result is extremely reliable for ruling out the condition (SnNout). Conversely,
high specificity is used to rule in a condition with a positive result (SpPin).
, 9. A nurse researcher conducting a qualitative phenomenological study on the lived
experiences of ICU nurses during a pandemic saturation phase reaches a point where no
new conceptual insights or themes emerge from participant interviews. What
methodological milestone has been achieved?
A. Saturation
B. Triangulation
C. Member checking
D. Confirmability
ANSWER: A. Saturation
Data saturation occurs when gathering additional qualitative data yields no new thematic
insights or properties, signaling the appropriate stopping point for data collection.
Triangulation involves using multiple data sources, member checking validates findings with
participants, and confirmability addresses neutrality.
10. An advanced practice nurse is reviewing a systematic review that combines quantitative
results from multiple independent randomized controlled trials on wound healing. What
statistical technique was likely utilized to synthesize these numerical findings?
A. Meta-analysis
B. Metasynthesis
C. Content analysis
D. Narrative review
ANSWER: A. Meta-analysis
A meta-analysis is a quantitative systematic review method that pools numerical data from
multiple primary studies to calculate a combined overall effect size. Metasynthesis synthesizes
qualitative findings, content analysis categorizes text data, and a narrative review provides a
qualitative overview without formal statistical pooling.
11. A nurse manager is implementing an evidence-based practice guideline regarding
central line maintenance. Using the PICO format for the clinical question, what does the
letter 'C' represent?
A. Comparison intervention or usual care
B. Clinical context of the hospital unit
C. Cost-benefit ratio of the intervention
D. Confounding variable to be controlled
ANSWER: A. Comparison intervention or usual care
