Statistics MCQs
Statistics MCQs serve as an essential tool for students, researchers, and exam candidates to understand and master the fundamentals of statistical analysis. This category features a rich set of multiple-choice questions covering topics such as probability, sampling, hypothesis testing, measures of central tendency and dispersion, correlation, regression, and data interpretation. These MCQs are ideal for test preparations including CSS, NTS, PMS, GAT, university entrance exams, and job recruitment tests where statistical knowledge is tested. The questions range from basic theory to practical problem-solving scenarios, allowing learners to evaluate and enhance their conceptual understanding. Practicing regularly not only strengthens your analytical skills but also prepares you to apply statistical techniques in real-world contexts. This category is particularly useful for students in social sciences, economics, business, and research-based programs. Improve your statistical thinking by solving our curated Statistics MCQs.
Q: A population parameter is
A) Unknown constant
B) Statistic
C) Known fixed value
D) Estimated value
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Correct Answer: A
Explanation: A parameter is a fixed but usually unknown characteristic of a population.
Q: Mode of a dataset represents
A) Range
B) Middle value
C) Average value
D) Most frequent value
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Correct Answer: D
Explanation: Mode refers to the value that appears most frequently in the dataset.
Q: Increasing sample size affects confidence interval by
A) Making it narrower
B) Making it wider
C) Keeping it same
D) No effect
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Correct Answer: A
Explanation: Larger sample sizes decrease variability, leading to narrower confidence intervals.
Q: The area under the entire normal distribution curve equals
A) 0.5
B) 1
C) ฯ
D) 2
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Correct Answer: B
Explanation: Total area under the curve of a probability distribution equals 1.
Q: Histogram is used to display
A) Categorical data
B) Proportions
C) Relationships
D) Frequency distribution of intervals
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Correct Answer: D
Explanation: Histograms show the frequency of data within equal-width intervals.
Q: Data that cannot be arranged in a specific order is
A) Interval
B) Ordinal
C) Ratio
D) Nominal
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Correct Answer: D
Explanation: Nominal data represents categories without any inherent order.
Q: A sample drawn so every element has equal chance is called
A) Cluster sample
B) Random sample
C) Stratified sample
D) Biased sample
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Correct Answer: B
Explanation: A random sample gives each member of the population an equal chance of selection.
Q: The median is unaffected by
A) Mean
B) Central values
C) Outliers
D) Sample size
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Correct Answer: C
Explanation: Unlike the mean, the median is resistant to extreme values or outliers.
Q: Probability of complementary events adds up to
A) 0
B) 1
C) Undefined
D) 2
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Correct Answer: B
Explanation: The sum of probabilities of an event and its complement is always 1.
Q: Chi-square test is used to
A) Calculate correlation
B) Compare means
C) Test independence
D) Estimate population mean
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Correct Answer: C
Explanation: Chi-square tests whether variables are independent in a contingency table.