HLT 362V Applied Statistics for
Health Care Professionals Quiz 2
Completed and Graded AA
Course
HLT 362
1. Which measure of central tendency is most affected by extreme values?
A. Mode
B. Median
C. Mean ✅
D. Range
Answer: C
Rationale: The mean incorporates every value in a dataset, making it sensitive to outliers.
2. Which measure describes the spread of data around the mean?
A. Mean
B. Median
C. Standard deviation ✅
D. Mode
Answer: C
Rationale: Standard deviation measures variability around the mean.
3. A p-value less than 0.05 generally indicates:
A. The null hypothesis is proven true.
B. The results are statistically significant. ✅
C. The sample size is too small.
D. The study is invalid.
,Answer: B
Rationale: A p-value below the significance level suggests sufficient evidence to reject the null
hypothesis.
4. What is the purpose of a null hypothesis?
A. To prove the research hypothesis
B. To summarize results
C. To state that no significant difference or relationship exists ✅
D. To identify the sample size
Answer: C
Rationale: The null hypothesis assumes no effect or association.
5. Which test compares the means of two independent groups?
A. Chi-square test
B. Independent samples t-test ✅
C. ANOVA
D. Pearson correlation
Answer: B
Rationale: The independent t-test compares the means of two unrelated groups.
6. Which statistical test is appropriate for comparing the means of three or more groups?
A. Independent t-test
B. Chi-square test
C. One-way ANOVA ✅
D. Pearson correlation
Answer: C
, Rationale: ANOVA evaluates differences among three or more independent groups.
7. Which variable is manipulated by the researcher?
A. Dependent variable
B. Independent variable ✅
C. Confounding variable
D. Extraneous variable
Answer: B
Rationale: The independent variable is the predictor or treatment.
8. Which variable represents the outcome being measured?
A. Independent variable
B. Dependent variable ✅
C. Nominal variable
D. Control variable
Answer: B
Rationale: The dependent variable reflects the effect of the independent variable.
9. A Type I error occurs when the researcher:
A. Accepts a false null hypothesis.
B. Rejects a true null hypothesis. ✅
C. Rejects a false null hypothesis.
D. Makes no statistical error.
Answer: B
Rationale: A Type I error is a false-positive conclusion.
Health Care Professionals Quiz 2
Completed and Graded AA
Course
HLT 362
1. Which measure of central tendency is most affected by extreme values?
A. Mode
B. Median
C. Mean ✅
D. Range
Answer: C
Rationale: The mean incorporates every value in a dataset, making it sensitive to outliers.
2. Which measure describes the spread of data around the mean?
A. Mean
B. Median
C. Standard deviation ✅
D. Mode
Answer: C
Rationale: Standard deviation measures variability around the mean.
3. A p-value less than 0.05 generally indicates:
A. The null hypothesis is proven true.
B. The results are statistically significant. ✅
C. The sample size is too small.
D. The study is invalid.
,Answer: B
Rationale: A p-value below the significance level suggests sufficient evidence to reject the null
hypothesis.
4. What is the purpose of a null hypothesis?
A. To prove the research hypothesis
B. To summarize results
C. To state that no significant difference or relationship exists ✅
D. To identify the sample size
Answer: C
Rationale: The null hypothesis assumes no effect or association.
5. Which test compares the means of two independent groups?
A. Chi-square test
B. Independent samples t-test ✅
C. ANOVA
D. Pearson correlation
Answer: B
Rationale: The independent t-test compares the means of two unrelated groups.
6. Which statistical test is appropriate for comparing the means of three or more groups?
A. Independent t-test
B. Chi-square test
C. One-way ANOVA ✅
D. Pearson correlation
Answer: C
, Rationale: ANOVA evaluates differences among three or more independent groups.
7. Which variable is manipulated by the researcher?
A. Dependent variable
B. Independent variable ✅
C. Confounding variable
D. Extraneous variable
Answer: B
Rationale: The independent variable is the predictor or treatment.
8. Which variable represents the outcome being measured?
A. Independent variable
B. Dependent variable ✅
C. Nominal variable
D. Control variable
Answer: B
Rationale: The dependent variable reflects the effect of the independent variable.
9. A Type I error occurs when the researcher:
A. Accepts a false null hypothesis.
B. Rejects a true null hypothesis. ✅
C. Rejects a false null hypothesis.
D. Makes no statistical error.
Answer: B
Rationale: A Type I error is a false-positive conclusion.
