QID #26268
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Negative correlation?
A
Symmetric bell-shaped continuous distribution characterized by mean and variance
B
Relationship in which variables tend to move in opposite directions
C
Most frequently occurring value
D
Sum of observations divided by the number of observations
Correct Answer: B. Relationship in which variables tend to move in opposite directions
Question: Which statement best explains Negative correlation?
A. Symmetric bell-shaped continuous distribution characterized by mean and variance
B. Relationship in which variables tend to move in opposite directions
C. Most frequently occurring value
D. Sum of observations divided by the number of observations
Correct Answer: B. Relationship in which variables tend to move in opposite directions
Explanation: Negative correlation: Relationship in which variables tend to move in opposite directions
QID #26267
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Relationship in which variables tend to move in opposite directions
A
Sample
B
Arithmetic mean
C
Variance
D
Negative correlation
Correct Answer: D. Negative correlation
Question: Which of the following is best described as: Relationship in which variables tend to move in opposite directions
A. Sample
B. Arithmetic mean
C. Variance
D. Negative correlation
Correct Answer: D. Negative correlation
Explanation: The correct answer is Negative correlation. Relationship in which variables tend to move in opposite directions
QID #26266
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Positive correlation?
A
Relationship in which variables tend to move in the same direction
B
Most frequently occurring value
C
Events for which occurrence of one does not change probability of the other
D
Sum of observations divided by the number of observations
Correct Answer: A. Relationship in which variables tend to move in the same direction
Question: Which statement best explains Positive correlation?
A. Relationship in which variables tend to move in the same direction
B. Most frequently occurring value
C. Events for which occurrence of one does not change probability of the other
D. Sum of observations divided by the number of observations
Correct Answer: A. Relationship in which variables tend to move in the same direction
Explanation: Positive correlation: Relationship in which variables tend to move in the same direction
QID #26265
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Relationship in which variables tend to move in the same direction
A
Sampling error
B
Positive correlation
C
Standard deviation
D
Independent events
Correct Answer: B. Positive correlation
Question: Which of the following is best described as: Relationship in which variables tend to move in the same direction
A. Sampling error
B. Positive correlation
C. Standard deviation
D. Independent events
Correct Answer: B. Positive correlation
Explanation: The correct answer is Positive correlation. Relationship in which variables tend to move in the same direction
QID #26264
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Correlation?
A
Numerical measure between 0 and 1 describing likelihood of an event
B
Measure of direction and strength of association between variables
C
Subset selected from a population for study
D
Statistical method for modelling relationship between dependent and explanatory variables
Correct Answer: B. Measure of direction and strength of association between variables
Question: Which statement best explains Correlation?
A. Numerical measure between 0 and 1 describing likelihood of an event
B. Measure of direction and strength of association between variables
C. Subset selected from a population for study
D. Statistical method for modelling relationship between dependent and explanatory variables
Correct Answer: B. Measure of direction and strength of association between variables
Explanation: Correlation: Measure of direction and strength of association between variables
QID #26263
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Measure of direction and strength of association between variables
A
Normal distribution
B
Regression
C
Correlation
D
Random variable
Correct Answer: C. Correlation
Question: Which of the following is best described as: Measure of direction and strength of association between variables
A. Normal distribution
B. Regression
C. Correlation
D. Random variable
Correct Answer: C. Correlation
Explanation: The correct answer is Correlation. Measure of direction and strength of association between variables
QID #26262
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Normal distribution?
A
Events that cannot occur simultaneously
B
Measure of direction and strength of association between variables
C
Symmetric bell-shaped continuous distribution characterized by mean and variance
D
Numerical measure between 0 and 1 describing likelihood of an event
Correct Answer: C. Symmetric bell-shaped continuous distribution characterized by mean and variance
Question: Which statement best explains Normal distribution?
A. Events that cannot occur simultaneously
B. Measure of direction and strength of association between variables
C. Symmetric bell-shaped continuous distribution characterized by mean and variance
D. Numerical measure between 0 and 1 describing likelihood of an event
Correct Answer: C. Symmetric bell-shaped continuous distribution characterized by mean and variance
Explanation: Normal distribution: Symmetric bell-shaped continuous distribution characterized by mean and variance
QID #26261
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Symmetric bell-shaped continuous distribution characterized by mean and variance
A
Variance
B
Census
C
Population
D
Normal distribution
Correct Answer: D. Normal distribution
Question: Which of the following is best described as: Symmetric bell-shaped continuous distribution characterized by mean and variance
A. Variance
B. Census
C. Population
D. Normal distribution
Correct Answer: D. Normal distribution
Explanation: The correct answer is Normal distribution. Symmetric bell-shaped continuous distribution characterized by mean and variance
QID #26260
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Random variable?
A
Relationship in which variables tend to move in the same direction
B
Variable whose numerical value depends on the outcome of a random experiment
C
Complete enumeration of all units in a population
D
Statistical method for modelling relationship between dependent and explanatory variables
Correct Answer: B. Variable whose numerical value depends on the outcome of a random experiment
Question: Which statement best explains Random variable?
A. Relationship in which variables tend to move in the same direction
B. Variable whose numerical value depends on the outcome of a random experiment
C. Complete enumeration of all units in a population
D. Statistical method for modelling relationship between dependent and explanatory variables
Correct Answer: B. Variable whose numerical value depends on the outcome of a random experiment
Explanation: Random variable: Variable whose numerical value depends on the outcome of a random experiment
QID #26259
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Variable whose numerical value depends on the outcome of a random experiment
A
Positive correlation
B
Random variable
C
Mode
D
Range
Correct Answer: B. Random variable
Question: Which of the following is best described as: Variable whose numerical value depends on the outcome of a random experiment
A. Positive correlation
B. Random variable
C. Mode
D. Range
Correct Answer: B. Random variable
Explanation: The correct answer is Random variable. Variable whose numerical value depends on the outcome of a random experiment
QID #26258
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Independent events?
A
Events for which occurrence of one does not change probability of the other
B
Events that cannot occur simultaneously
C
Middle value after arranging observations in order
D
Difference arising because a sample rather than the whole population is observed
Correct Answer: A. Events for which occurrence of one does not change probability of the other
Question: Which statement best explains Independent events?
A. Events for which occurrence of one does not change probability of the other
B. Events that cannot occur simultaneously
C. Middle value after arranging observations in order
D. Difference arising because a sample rather than the whole population is observed
Correct Answer: A. Events for which occurrence of one does not change probability of the other
Explanation: Independent events: Events for which occurrence of one does not change probability of the other
QID #26257
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Events for which occurrence of one does not change probability of the other
A
Mode
B
Independent events
C
Regression
D
Population
Correct Answer: B. Independent events
Question: Which of the following is best described as: Events for which occurrence of one does not change probability of the other
A. Mode
B. Independent events
C. Regression
D. Population
Correct Answer: B. Independent events
Explanation: The correct answer is Independent events. Events for which occurrence of one does not change probability of the other
QID #26256
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Mutually exclusive events?
A
Average squared deviation from the mean, according to the chosen population or sample formula
B
Complete set of units or observations of interest
C
Events that cannot occur simultaneously
D
Numerical measure between 0 and 1 describing likelihood of an event
Correct Answer: C. Events that cannot occur simultaneously
Question: Which statement best explains Mutually exclusive events?
A. Average squared deviation from the mean, according to the chosen population or sample formula
B. Complete set of units or observations of interest
C. Events that cannot occur simultaneously
D. Numerical measure between 0 and 1 describing likelihood of an event
Correct Answer: C. Events that cannot occur simultaneously
Explanation: Mutually exclusive events: Events that cannot occur simultaneously
QID #26255
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Events that cannot occur simultaneously
A
Sample
B
Mutually exclusive events
C
Variance
D
Coefficient of variation
Correct Answer: B. Mutually exclusive events
Question: Which of the following is best described as: Events that cannot occur simultaneously
A. Sample
B. Mutually exclusive events
C. Variance
D. Coefficient of variation
Correct Answer: B. Mutually exclusive events
Explanation: The correct answer is Mutually exclusive events. Events that cannot occur simultaneously
QID #26254
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Probability?
A
Numerical measure between 0 and 1 describing likelihood of an event
B
Variable whose numerical value depends on the outcome of a random experiment
C
Sum of observations divided by the number of observations
D
Subset selected from a population for study
Correct Answer: A. Numerical measure between 0 and 1 describing likelihood of an event
Question: Which statement best explains Probability?
A. Numerical measure between 0 and 1 describing likelihood of an event
B. Variable whose numerical value depends on the outcome of a random experiment
C. Sum of observations divided by the number of observations
D. Subset selected from a population for study
Correct Answer: A. Numerical measure between 0 and 1 describing likelihood of an event
Explanation: Probability: Numerical measure between 0 and 1 describing likelihood of an event
QID #26253
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Numerical measure between 0 and 1 describing likelihood of an event
A
Negative correlation
B
Census
C
Probability
D
Positive correlation
Correct Answer: C. Probability
Question: Which of the following is best described as: Numerical measure between 0 and 1 describing likelihood of an event
A. Negative correlation
B. Census
C. Probability
D. Positive correlation
Correct Answer: C. Probability
Explanation: The correct answer is Probability. Numerical measure between 0 and 1 describing likelihood of an event
QID #26252
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Coefficient of variation?
A
Sum of observations divided by the number of observations
B
Standard deviation expressed relative to the mean, commonly as a percentage
C
Complete enumeration of all units in a population
D
Events for which occurrence of one does not change probability of the other
Correct Answer: B. Standard deviation expressed relative to the mean, commonly as a percentage
Question: Which statement best explains Coefficient of variation?
A. Sum of observations divided by the number of observations
B. Standard deviation expressed relative to the mean, commonly as a percentage
C. Complete enumeration of all units in a population
D. Events for which occurrence of one does not change probability of the other
Correct Answer: B. Standard deviation expressed relative to the mean, commonly as a percentage
Explanation: Coefficient of variation: Standard deviation expressed relative to the mean, commonly as a percentage
QID #26251
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Standard deviation expressed relative to the mean, commonly as a percentage
A
Normal distribution
B
Regression
C
Median
D
Coefficient of variation
Correct Answer: D. Coefficient of variation
Question: Which of the following is best described as: Standard deviation expressed relative to the mean, commonly as a percentage
A. Normal distribution
B. Regression
C. Median
D. Coefficient of variation
Correct Answer: D. Coefficient of variation
Explanation: The correct answer is Coefficient of variation. Standard deviation expressed relative to the mean, commonly as a percentage
QID #26250
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Standard deviation?
A
Symmetric bell-shaped continuous distribution characterized by mean and variance
B
Middle value after arranging observations in order
C
Difference arising because a sample rather than the whole population is observed
D
Positive square root of variance
Correct Answer: D. Positive square root of variance
Question: Which statement best explains Standard deviation?
A. Symmetric bell-shaped continuous distribution characterized by mean and variance
B. Middle value after arranging observations in order
C. Difference arising because a sample rather than the whole population is observed
D. Positive square root of variance
Correct Answer: D. Positive square root of variance
Explanation: Standard deviation: Positive square root of variance
QID #26249
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Positive square root of variance
A
Mutually exclusive events
B
Standard deviation
C
Variance
D
Sample
Correct Answer: B. Standard deviation
Question: Which of the following is best described as: Positive square root of variance
A. Mutually exclusive events
B. Standard deviation
C. Variance
D. Sample
Correct Answer: B. Standard deviation
Explanation: The correct answer is Standard deviation. Positive square root of variance
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