Statistics MCQs

Statistics MCQs cover probability, sampling, hypothesis testing, correlation, regression, and data interpretation. Ideal for CSS, NTS, PMS, GAT, and university exams, they boost conceptual understanding, analytical skills, and real-world statistical application.

Q: Quartiles divide a data set into
A) 2 equal parts
B) 5 equal parts
C) 4 equal parts
D) 3 equal parts
โœ… Correct Answer: C
Explanation: Quartiles split data into four equal parts.
Q: Type I error occurs when
A) Null is true but rejected
B) Hypothesis is proven
C) Null is false and accepted
D) Alternative is true
โœ… Correct Answer: A
Explanation: A Type I error means rejecting a true null hypothesis.
Q: Standard deviation is a measure of
A) Spread of data
B) Sample size
C) Association
D) Central tendency
โœ… Correct Answer: A
Explanation: Standard deviation quantifies how much the data varies from the mean.
Q: A positively skewed distribution has
A) Equal tails
B) Symmetric shape
C) Long tail on right
D) Long tail on left
โœ… Correct Answer: C
Explanation: In a positively skewed distribution, the tail extends to the right.
Q: Correlation coefficient ranges from
A) 0 to 1
B) -2 to +2
C) 1 to 10
D) -1 to +1
โœ… Correct Answer: D
Explanation: The Pearson correlation coefficient lies between -1 and +1.