STAT 3001 Statistical Methods & Applications
Complete Midterm Exam Review (Qns & Ans)
2025
1. What is the primary purpose of using inferential statistics in
nursing research?
- A. To summarize raw data
- B. To establish cause-and-effect relationships
- C. To make predictions and generalizations about a population
from a sample
- D. To calculate descriptive measures like mean and median
ANS : C. To make predictions and generalizations about a
population from a sample
Rationale : Inferential statistics allow researchers to infer
population characteristics based on sample data.
©2025
,2. Which type of variable is measured on a nominal scale?
- A. Blood pressure readings
- B. Patient gender
- C. Pain severity on a Likert scale
- D. Body weight in kilograms
ANS : B. Patient gender
Rationale : Nominal variables categorize data without any
inherent order or ranking, such as gender, race, or blood type.
3. Which statistical test is most appropriate for comparing the
means of two independent groups?
- A. Chi-square test
- B. Paired t-test
- C. Independent samples t-test
- D. ANOVA
ANS : C. Independent samples t-test
Rationale : An independent samples t-test is used to compare
the means of two independent groups to identify significant
differences.
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©2025
, Fill-in-the-Blank Questions
4. The ____, measures the strength and direction of a linear
relationship between two continuous variables.
ANS : Correlation coefficient
Rationale : The correlation coefficient quantifies the degree of
association between two variables, with values ranging from -1 to
+1.
5. The ____, hypothesis assumes no effect or relationship exists
between the variables being studied.
ANS : Null
Rationale : The null hypothesis serves as the baseline
assumption in statistical testing and is either rejected or not
rejected based on the data.
6. In a bell-shaped normal distribution, approximately ____
percent of data falls within one standard deviation of the mean.
ANS : 68
Rationale : The empirical rule states that 68% of values lie
within one standard deviation of the mean in a normal
distribution.
©2025
Complete Midterm Exam Review (Qns & Ans)
2025
1. What is the primary purpose of using inferential statistics in
nursing research?
- A. To summarize raw data
- B. To establish cause-and-effect relationships
- C. To make predictions and generalizations about a population
from a sample
- D. To calculate descriptive measures like mean and median
ANS : C. To make predictions and generalizations about a
population from a sample
Rationale : Inferential statistics allow researchers to infer
population characteristics based on sample data.
©2025
,2. Which type of variable is measured on a nominal scale?
- A. Blood pressure readings
- B. Patient gender
- C. Pain severity on a Likert scale
- D. Body weight in kilograms
ANS : B. Patient gender
Rationale : Nominal variables categorize data without any
inherent order or ranking, such as gender, race, or blood type.
3. Which statistical test is most appropriate for comparing the
means of two independent groups?
- A. Chi-square test
- B. Paired t-test
- C. Independent samples t-test
- D. ANOVA
ANS : C. Independent samples t-test
Rationale : An independent samples t-test is used to compare
the means of two independent groups to identify significant
differences.
---
©2025
, Fill-in-the-Blank Questions
4. The ____, measures the strength and direction of a linear
relationship between two continuous variables.
ANS : Correlation coefficient
Rationale : The correlation coefficient quantifies the degree of
association between two variables, with values ranging from -1 to
+1.
5. The ____, hypothesis assumes no effect or relationship exists
between the variables being studied.
ANS : Null
Rationale : The null hypothesis serves as the baseline
assumption in statistical testing and is either rejected or not
rejected based on the data.
6. In a bell-shaped normal distribution, approximately ____
percent of data falls within one standard deviation of the mean.
ANS : 68
Rationale : The empirical rule states that 68% of values lie
within one standard deviation of the mean in a normal
distribution.
©2025
