ASA 114 Practice Exam Questions With
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary purpose of statistics?
A. To collect only raw data
B. To organize and interpret data
C. To eliminate variability
D. To avoid using numbers
Answer: B
Rationale: Statistics is mainly used to organize, summarize,
analyze, and interpret data to make informed decisions.
2. Which of the following is a qualitative variable?
A. Height
B. Weight
C. Gender
D. Temperature
Answer: C
Rationale: Gender is categorical (non-numerical), making it
qualitative.
,3. A population refers to:
A. A sample of data
B. A subset of individuals
C. The entire group being studied
D. Only numerical data
Answer: C
Rationale: A population includes all individuals or items of interest
in a study.
4. A sample is:
A. The entire dataset
B. A subset of the population
C. Always larger than population
D. Not used in statistics
Answer: B
Rationale: A sample is a smaller group selected from the
population for analysis.
5. Which scale of measurement has a true zero?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Answer: D
Rationale: Ratio scales have a true zero indicating absence of the
variable.
,6. Mean is also known as:
A. Middle value
B. Most frequent value
C. Average
D. Range
Answer: C
Rationale: The mean is the arithmetic average of a dataset.
7. The median is:
A. The most common value
B. The middle value when data is ordered
C. The sum of all values
D. The difference between max and min
Answer: B
Rationale: Median divides ordered data into two equal halves.
8. The mode is:
A. The largest value
B. The smallest value
C. The most frequent value
D. The average value
Answer: C
Rationale: Mode is the value that occurs most often.
9. The range is calculated as:
A. Mean minus median
, B. Highest value minus lowest value
C. Sum of all values
D. Median minus mode
Answer: B
Rationale: Range measures spread by subtracting minimum from
maximum.
10. Variance measures:
A. Center of data
B. Spread of data
C. Frequency of data
D. Shape of data
Answer: B
Rationale: Variance quantifies how far data values are from the
mean.
11. Standard deviation is:
A. Square of variance
B. Square root of variance
C. Mean of data
D. Median of data
Answer: B
Rationale: Standard deviation is the square root of variance,
making it interpretable in original units.
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of statistics?
A. To collect only raw data
B. To organize and interpret data
C. To eliminate variability
D. To avoid using numbers
Answer: B
Rationale: Statistics is mainly used to organize, summarize,
analyze, and interpret data to make informed decisions.
2. Which of the following is a qualitative variable?
A. Height
B. Weight
C. Gender
D. Temperature
Answer: C
Rationale: Gender is categorical (non-numerical), making it
qualitative.
,3. A population refers to:
A. A sample of data
B. A subset of individuals
C. The entire group being studied
D. Only numerical data
Answer: C
Rationale: A population includes all individuals or items of interest
in a study.
4. A sample is:
A. The entire dataset
B. A subset of the population
C. Always larger than population
D. Not used in statistics
Answer: B
Rationale: A sample is a smaller group selected from the
population for analysis.
5. Which scale of measurement has a true zero?
A. Nominal
B. Ordinal
C. Interval
D. Ratio
Answer: D
Rationale: Ratio scales have a true zero indicating absence of the
variable.
,6. Mean is also known as:
A. Middle value
B. Most frequent value
C. Average
D. Range
Answer: C
Rationale: The mean is the arithmetic average of a dataset.
7. The median is:
A. The most common value
B. The middle value when data is ordered
C. The sum of all values
D. The difference between max and min
Answer: B
Rationale: Median divides ordered data into two equal halves.
8. The mode is:
A. The largest value
B. The smallest value
C. The most frequent value
D. The average value
Answer: C
Rationale: Mode is the value that occurs most often.
9. The range is calculated as:
A. Mean minus median
, B. Highest value minus lowest value
C. Sum of all values
D. Median minus mode
Answer: B
Rationale: Range measures spread by subtracting minimum from
maximum.
10. Variance measures:
A. Center of data
B. Spread of data
C. Frequency of data
D. Shape of data
Answer: B
Rationale: Variance quantifies how far data values are from the
mean.
11. Standard deviation is:
A. Square of variance
B. Square root of variance
C. Mean of data
D. Median of data
Answer: B
Rationale: Standard deviation is the square root of variance,
making it interpretable in original units.
