NURS 5366 Module 7 Exam V1 | NURS
5366 Principles of Research in Nursing |
Actual Q&A with Rationale (NURS5366
Module 7 Exam) | The University of Texas
at Arlington
1. In quantitative research, which statistical value represents the probability that the
observed results occurred by chance alone?
A. Cronbach’s alpha
B. p-value
C. Standard deviation
D. Pearson’s r
Answer: B
Rationale: The p-value is the correct answer because it indicates the level of statistical
significance in a hypothesis test. It measures the likelihood of obtaining results as extreme
as those observed, assuming the null hypothesis is true. In nursing research, a p-value of
less than 0.05 is typically used to reject the null hypothesis and support the intervention’s
efficacy.
2. Which level of measurement is used when classifying patients by their primary medical
diagnosis?
A. Ratio
,B. Ordinal
C. Interval
D. Nominal
Answer: D
Rationale: The Nominal scale is the correct answer as it is used for categorization without
any inherent numerical value or rank. Medical diagnoses are mutually exclusive categories
that do not follow a logical order. This level of measurement is fundamental in descriptive
statistics for identifying the characteristics of a study population.
3. A researcher fails to reject the null hypothesis when it is actually false. What type of error
has occurred?
A. Type I error
B. Type II error
C. Sampling error
D. Measurement error
Answer: B
Rationale: A Type II error is the correct answer because it describes a ‘false negative’
where a true difference is missed. This often occurs due to an insufficient sample size,
which reduces the statistical power of the study. Researchers aim to minimize this error to
ensure that effective clinical treatments are not overlooked during data analysis.
, 4. What is the primary purpose of conducting a power analysis before starting a study?
A. To select the statistical software
B. To identify the research question
C. To calculate the mean of the data
D. To determine the required sample size
Answer: D
Rationale: To determine the required sample size is the correct answer as power analysis
helps ensure the study has enough participants to detect an effect if one exists. Adequate
power, usually set at 0.80, reduces the risk of committing a Type II error. This step is
critical during the planning phase of nursing research to justify the resources and time
spent on data collection.
5. Which measure of central tendency is most appropriate for a dataset with significant
outliers?
A. Mean
B. Mode
C. Median
D. Range
Answer: C
5366 Principles of Research in Nursing |
Actual Q&A with Rationale (NURS5366
Module 7 Exam) | The University of Texas
at Arlington
1. In quantitative research, which statistical value represents the probability that the
observed results occurred by chance alone?
A. Cronbach’s alpha
B. p-value
C. Standard deviation
D. Pearson’s r
Answer: B
Rationale: The p-value is the correct answer because it indicates the level of statistical
significance in a hypothesis test. It measures the likelihood of obtaining results as extreme
as those observed, assuming the null hypothesis is true. In nursing research, a p-value of
less than 0.05 is typically used to reject the null hypothesis and support the intervention’s
efficacy.
2. Which level of measurement is used when classifying patients by their primary medical
diagnosis?
A. Ratio
,B. Ordinal
C. Interval
D. Nominal
Answer: D
Rationale: The Nominal scale is the correct answer as it is used for categorization without
any inherent numerical value or rank. Medical diagnoses are mutually exclusive categories
that do not follow a logical order. This level of measurement is fundamental in descriptive
statistics for identifying the characteristics of a study population.
3. A researcher fails to reject the null hypothesis when it is actually false. What type of error
has occurred?
A. Type I error
B. Type II error
C. Sampling error
D. Measurement error
Answer: B
Rationale: A Type II error is the correct answer because it describes a ‘false negative’
where a true difference is missed. This often occurs due to an insufficient sample size,
which reduces the statistical power of the study. Researchers aim to minimize this error to
ensure that effective clinical treatments are not overlooked during data analysis.
, 4. What is the primary purpose of conducting a power analysis before starting a study?
A. To select the statistical software
B. To identify the research question
C. To calculate the mean of the data
D. To determine the required sample size
Answer: D
Rationale: To determine the required sample size is the correct answer as power analysis
helps ensure the study has enough participants to detect an effect if one exists. Adequate
power, usually set at 0.80, reduces the risk of committing a Type II error. This step is
critical during the planning phase of nursing research to justify the resources and time
spent on data collection.
5. Which measure of central tendency is most appropriate for a dataset with significant
outliers?
A. Mean
B. Mode
C. Median
D. Range
Answer: C
