(WU) STAT 3001 Statistical Methods & Applications - Midterm Exam Guide .

STAT 3001



Statistical Methods & Applications




MIDTERM EXAM GUIDE




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,1. Which statistical test is most appropriate for comparing the
mean blood pressure levels of two independent groups of patients
in a nursing study?
- A) Chi-square test
- B) Independent t-test
- C) Paired t-test
- D) ANOVA


Answer: B) Independent t-test


Rationale: The independent t-test compares the means of two
independent groups.


2. In a nursing study examining the impact of a new drug on
patient recovery times, which of the following describes a Type I
error?
- A) Rejecting the null hypothesis when it is true
- B) Failing to reject the null hypothesis when it is false
- C) Accepting the null hypothesis when it is true
- D) Accepting the null hypothesis when it is false


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, Answer: A) Rejecting the null hypothesis when it is true


Rationale: A Type I error occurs when the null hypothesis is
incorrectly rejected.


3. Which of the following techniques is used to control for
confounding variables in a clinical trial?
- A) Randomization
- B) Stratification
- C) Matching
- D) All of the above


Answer: D) All of the above


Rationale: Randomization, stratification, and matching are all
methods used to control for confounding variables.


### Fill-in-the-Blank Questions


4. Within the context of a regression analysis, the ________
measures the proportion of variation in the dependent variable that
is predictable from the independent variable(s).
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