NURS 5366 Module 9 Exam V1 | NURS
5366 Principles of Research in Nursing |
Actual Q&A with Rationale (NURS5366
Module 9 Exam) | The University of Texas
at Arlington
1. In nursing research, what does a p-value of less than 0.05 typically signify regarding the null
hypothesis?
A. The null hypothesis is accepted as true.
B. The null hypothesis is rejected in favor of the alternative hypothesis.
C. The research design was inherently flawed.
D. The sample size was too small to reach a conclusion.
Answer: B
Rationale: A p-value less than 0.05 indicates that there is a less than 5% probability that
the results occurred by chance. This leads the researcher to reject the null hypothesis,
suggesting a statistically significant finding. It is a standard threshold used in most clinical
nursing research to determine the strength of evidence against the null.
2. Which type of error occurs when a researcher incorrectly rejects a null hypothesis that is
actually true?
A. Systematic Error
,B. Type II Error
C. Standard Error
D. Type I Error
Answer: D
Rationale: A Type I error is often described as a ‘false positive’ result in statistical testing.
This happens when the researcher claims there is an effect or relationship when one does
not truly exist in the population. It is directly related to the alpha level set by the researcher
before conducting the analysis.
3. When a nurse researcher classifies participants based on their religion (e.g., Catholic,
Protestant, Jewish), which level of measurement is being utilized?
A. Nominal
B. Interval
C. Ordinal
D. Ratio
Answer: A
Rationale: Nominal measurement involves categorizing data into mutually exclusive
groups that do not have a mathematical order or rank. Religion is a qualitative variable
where the categories are labels rather than numerical values. This level of measurement is
the most basic form of data classification used in statistics.
, 4. A researcher is looking at the average age of participants in a study. Which measure of
central tendency is most sensitive to extreme outliers?
A. Median
B. Mode
C. Mean
D. Standard Deviation
Answer: C
Rationale: The mean is calculated by summing all values and dividing by the total count,
making it highly susceptible to very high or very low scores. In contrast, the median
represents the middle value and remains relatively stable even if outliers are present.
Researchers must evaluate data distribution to decide which measure of central tendency
best describes their sample.
5. Which statistical test is most appropriate for comparing the means of two independent
groups on a continuous dependent variable?
A. Independent t-test
B. Pearson Correlation
C. ANOVA
D. Chi-Square
Answer: A
5366 Principles of Research in Nursing |
Actual Q&A with Rationale (NURS5366
Module 9 Exam) | The University of Texas
at Arlington
1. In nursing research, what does a p-value of less than 0.05 typically signify regarding the null
hypothesis?
A. The null hypothesis is accepted as true.
B. The null hypothesis is rejected in favor of the alternative hypothesis.
C. The research design was inherently flawed.
D. The sample size was too small to reach a conclusion.
Answer: B
Rationale: A p-value less than 0.05 indicates that there is a less than 5% probability that
the results occurred by chance. This leads the researcher to reject the null hypothesis,
suggesting a statistically significant finding. It is a standard threshold used in most clinical
nursing research to determine the strength of evidence against the null.
2. Which type of error occurs when a researcher incorrectly rejects a null hypothesis that is
actually true?
A. Systematic Error
,B. Type II Error
C. Standard Error
D. Type I Error
Answer: D
Rationale: A Type I error is often described as a ‘false positive’ result in statistical testing.
This happens when the researcher claims there is an effect or relationship when one does
not truly exist in the population. It is directly related to the alpha level set by the researcher
before conducting the analysis.
3. When a nurse researcher classifies participants based on their religion (e.g., Catholic,
Protestant, Jewish), which level of measurement is being utilized?
A. Nominal
B. Interval
C. Ordinal
D. Ratio
Answer: A
Rationale: Nominal measurement involves categorizing data into mutually exclusive
groups that do not have a mathematical order or rank. Religion is a qualitative variable
where the categories are labels rather than numerical values. This level of measurement is
the most basic form of data classification used in statistics.
, 4. A researcher is looking at the average age of participants in a study. Which measure of
central tendency is most sensitive to extreme outliers?
A. Median
B. Mode
C. Mean
D. Standard Deviation
Answer: C
Rationale: The mean is calculated by summing all values and dividing by the total count,
making it highly susceptible to very high or very low scores. In contrast, the median
represents the middle value and remains relatively stable even if outliers are present.
Researchers must evaluate data distribution to decide which measure of central tendency
best describes their sample.
5. Which statistical test is most appropriate for comparing the means of two independent
groups on a continuous dependent variable?
A. Independent t-test
B. Pearson Correlation
C. ANOVA
D. Chi-Square
Answer: A
