NURS 5366 Module 8 Exam V2 | NURS
5366 Principles of Research in Nursing |
Actual Q&A with Rationale (NURS5366
Module 10 Exam) | The University of Texas
at Arlington
1. Which statistical measure represents the most frequently occurring value in a dataset?
A. Mean
B. Median
C. Mode
D. Standard Deviation
Answer: C
Rationale: The mode is the value that appears most often within a specific distribution.
This measure of central tendency is particularly useful for nominal level data where
numerical averaging is not possible. In research, identifying the mode helps nursing
students understand the most common characteristic of a sample population.
2. A researcher fails to reject the null hypothesis when it is actually false. This scenario
describes which type of error?
A. Type I Error
B. Measurement Error
,C. Standard Error
D. Type II Error
Answer: D
Rationale: A Type II error occurs when a researcher accepts a false null hypothesis,
effectively missing a real treatment effect. This error is often associated with insufficient
sample size or low statistical power in a study. Reducing the risk of this error involves
increasing the sample size to ensure the study is sensitive enough to detect differences.
3. In a normal distribution, approximately what percentage of data points fall within one
standard deviation of the mean?
A. 68%
B. 50%
C. 95%
D. 99%
Answer: A
Rationale: Approximately 68% of observations in a bell-shaped curve fall within one
standard deviation above or below the mean. This is a fundamental property of the
empirical rule used in parametric statistics. Understanding this distribution allows
researchers to identify outliers and understand the variance within their clinical data.
, 4. Which p-value is generally considered the standard threshold for statistical significance in
nursing research?
A. p < 0.10
B. p < 0.50
C. p < 0.05
D. p < 0.01
Answer: C
Rationale: A p-value of less than 0.05 indicates that there is a less than 5% probability that
the observed results occurred by chance alone. This alpha level is the conventional
benchmark for determining if a finding is statistically significant. While some studies use a
stricter 0.01 level, the 0.05 threshold is the most common standard in clinical nursing
studies.
5. What is the primary purpose of a t-test in quantitative research?
A. To determine the relationship between two variables.
B. To compare the means of two groups.
C. To predict the value of a dependent variable.
D. To describe the demographics of a sample.
Answer: B
5366 Principles of Research in Nursing |
Actual Q&A with Rationale (NURS5366
Module 10 Exam) | The University of Texas
at Arlington
1. Which statistical measure represents the most frequently occurring value in a dataset?
A. Mean
B. Median
C. Mode
D. Standard Deviation
Answer: C
Rationale: The mode is the value that appears most often within a specific distribution.
This measure of central tendency is particularly useful for nominal level data where
numerical averaging is not possible. In research, identifying the mode helps nursing
students understand the most common characteristic of a sample population.
2. A researcher fails to reject the null hypothesis when it is actually false. This scenario
describes which type of error?
A. Type I Error
B. Measurement Error
,C. Standard Error
D. Type II Error
Answer: D
Rationale: A Type II error occurs when a researcher accepts a false null hypothesis,
effectively missing a real treatment effect. This error is often associated with insufficient
sample size or low statistical power in a study. Reducing the risk of this error involves
increasing the sample size to ensure the study is sensitive enough to detect differences.
3. In a normal distribution, approximately what percentage of data points fall within one
standard deviation of the mean?
A. 68%
B. 50%
C. 95%
D. 99%
Answer: A
Rationale: Approximately 68% of observations in a bell-shaped curve fall within one
standard deviation above or below the mean. This is a fundamental property of the
empirical rule used in parametric statistics. Understanding this distribution allows
researchers to identify outliers and understand the variance within their clinical data.
, 4. Which p-value is generally considered the standard threshold for statistical significance in
nursing research?
A. p < 0.10
B. p < 0.50
C. p < 0.05
D. p < 0.01
Answer: C
Rationale: A p-value of less than 0.05 indicates that there is a less than 5% probability that
the observed results occurred by chance alone. This alpha level is the conventional
benchmark for determining if a finding is statistically significant. While some studies use a
stricter 0.01 level, the 0.05 threshold is the most common standard in clinical nursing
studies.
5. What is the primary purpose of a t-test in quantitative research?
A. To determine the relationship between two variables.
B. To compare the means of two groups.
C. To predict the value of a dependent variable.
D. To describe the demographics of a sample.
Answer: B
