C784 APPLIED HEALTHCARE STATISTICS
PRACTICE EXAM 2 QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2025
1. What type of variable is blood type (A, B, AB, O)?
A. Interval
B. Nominal
C. Ordinal
D. Ratio
Rationale: Blood type is a categorical variable without any intrinsic order,
making it nominal.
2. What is the primary measure of central tendency for ordinal data?
A. Mean
B. Median
C. Mode
D. Standard Deviation
,Rationale: The median is the best measure of central tendency for ordinal
data because it considers the order without assuming equal intervals.
3. A hospital records the number of patients who visit the ER each day.
What type of variable is this?
A. Continuous
B. Nominal
C. Ordinal
D. Discrete
Rationale: The number of patients is a countable value, which makes it a
discrete variable.
4. Which of the following is not a measure of dispersion?
A. Range
B. Median
C. Variance
D. Standard Deviation
Rationale: Median is a measure of central tendency, not dispersion.
5. What is the probability of flipping a fair coin and getting heads twice in a
row?
A. 1/3
B. 1/4
C. 1/2
D. 1/8
Rationale: The probability is 0.5 × 0.5 = 0.25 or 1/4.
,6. Which statistical test compares means between two independent
groups?
A. Chi-square
B. Independent t-test
C. ANOVA
D. Regression
Rationale: The independent t-test is used to compare the means of two
independent groups.
7. A box plot is best used to:
A. Show correlation
B. Determine frequency
C. Display distribution and detect outliers
D. Analyze regression
Rationale: Box plots show median, quartiles, and outliers, making it ideal
for distribution.
8. What type of graph is best for displaying the relationship between two
continuous variables?
A. Bar graph
B. Pie chart
C. Scatter plot
D. Histogram
Rationale: Scatter plots show relationships between two continuous
variables.
, 9. A normal distribution is symmetric and has a mean of 0 and standard
deviation of 1. What is this distribution called?
A. Binomial
B. Chi-square
C. Standard normal distribution
D. Poisson
Rationale: A standard normal distribution has a mean of 0 and SD of 1.
10. Which statement about the p-value is correct?
A. It proves the null hypothesis is false.
B. It shows the probability that the alternative hypothesis is true.
C. It represents the probability of observing the data if the null hypothesis
is true.
D. It confirms causation.
Rationale: The p-value tells us how likely the observed result is if the null
hypothesis is true.
11. What level of measurement is the variable "Pain Scale (0 to 10)"?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Rationale: Pain scales are considered interval data because the intervals
are meaningful, but there is no true zero.
PRACTICE EXAM 2 QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2025
1. What type of variable is blood type (A, B, AB, O)?
A. Interval
B. Nominal
C. Ordinal
D. Ratio
Rationale: Blood type is a categorical variable without any intrinsic order,
making it nominal.
2. What is the primary measure of central tendency for ordinal data?
A. Mean
B. Median
C. Mode
D. Standard Deviation
,Rationale: The median is the best measure of central tendency for ordinal
data because it considers the order without assuming equal intervals.
3. A hospital records the number of patients who visit the ER each day.
What type of variable is this?
A. Continuous
B. Nominal
C. Ordinal
D. Discrete
Rationale: The number of patients is a countable value, which makes it a
discrete variable.
4. Which of the following is not a measure of dispersion?
A. Range
B. Median
C. Variance
D. Standard Deviation
Rationale: Median is a measure of central tendency, not dispersion.
5. What is the probability of flipping a fair coin and getting heads twice in a
row?
A. 1/3
B. 1/4
C. 1/2
D. 1/8
Rationale: The probability is 0.5 × 0.5 = 0.25 or 1/4.
,6. Which statistical test compares means between two independent
groups?
A. Chi-square
B. Independent t-test
C. ANOVA
D. Regression
Rationale: The independent t-test is used to compare the means of two
independent groups.
7. A box plot is best used to:
A. Show correlation
B. Determine frequency
C. Display distribution and detect outliers
D. Analyze regression
Rationale: Box plots show median, quartiles, and outliers, making it ideal
for distribution.
8. What type of graph is best for displaying the relationship between two
continuous variables?
A. Bar graph
B. Pie chart
C. Scatter plot
D. Histogram
Rationale: Scatter plots show relationships between two continuous
variables.
, 9. A normal distribution is symmetric and has a mean of 0 and standard
deviation of 1. What is this distribution called?
A. Binomial
B. Chi-square
C. Standard normal distribution
D. Poisson
Rationale: A standard normal distribution has a mean of 0 and SD of 1.
10. Which statement about the p-value is correct?
A. It proves the null hypothesis is false.
B. It shows the probability that the alternative hypothesis is true.
C. It represents the probability of observing the data if the null hypothesis
is true.
D. It confirms causation.
Rationale: The p-value tells us how likely the observed result is if the null
hypothesis is true.
11. What level of measurement is the variable "Pain Scale (0 to 10)"?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Rationale: Pain scales are considered interval data because the intervals
are meaningful, but there is no true zero.
