QID #26278
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Census?
A
Numerical measure between 0 and 1 describing likelihood of an event
B
Difference between maximum and minimum values
C
Complete enumeration of all units in a population
D
Positive square root of variance
Correct Answer: C. Complete enumeration of all units in a population
Question: Which statement best explains Census?
A. Numerical measure between 0 and 1 describing likelihood of an event
B. Difference between maximum and minimum values
C. Complete enumeration of all units in a population
D. Positive square root of variance
Correct Answer: C. Complete enumeration of all units in a population
Explanation: Census: Complete enumeration of all units in a population
QID #26277
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Complete enumeration of all units in a population
A
Census
B
Range
C
Positive correlation
D
Standard deviation
Correct Answer: A. Census
Question: Which of the following is best described as: Complete enumeration of all units in a population
A. Census
B. Range
C. Positive correlation
D. Standard deviation
Correct Answer: A. Census
Explanation: The correct answer is Census. Complete enumeration of all units in a population
QID #26276
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Sampling error?
A
Variable whose numerical value depends on the outcome of a random experiment
B
Difference arising because a sample rather than the whole population is observed
C
Middle value after arranging observations in order
D
Standard deviation expressed relative to the mean, commonly as a percentage
Correct Answer: B. Difference arising because a sample rather than the whole population is observed
Question: Which statement best explains Sampling error?
A. Variable whose numerical value depends on the outcome of a random experiment
B. Difference arising because a sample rather than the whole population is observed
C. Middle value after arranging observations in order
D. Standard deviation expressed relative to the mean, commonly as a percentage
Correct Answer: B. Difference arising because a sample rather than the whole population is observed
Explanation: Sampling error: Difference arising because a sample rather than the whole population is observed
QID #26275
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Difference arising because a sample rather than the whole population is observed
A
Random variable
B
Coefficient of variation
C
Sampling error
D
Variance
Correct Answer: C. Sampling error
Question: Which of the following is best described as: Difference arising because a sample rather than the whole population is observed
A. Random variable
B. Coefficient of variation
C. Sampling error
D. Variance
Correct Answer: C. Sampling error
Explanation: The correct answer is Sampling error. Difference arising because a sample rather than the whole population is observed
QID #26274
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Sample?
A
Most frequently occurring value
B
Relationship in which variables tend to move in opposite directions
C
Average squared deviation from the mean, according to the chosen population or sample formula
D
Subset selected from a population for study
Correct Answer: D. Subset selected from a population for study
Question: Which statement best explains Sample?
A. Most frequently occurring value
B. Relationship in which variables tend to move in opposite directions
C. Average squared deviation from the mean, according to the chosen population or sample formula
D. Subset selected from a population for study
Correct Answer: D. Subset selected from a population for study
Explanation: Sample: Subset selected from a population for study
QID #26273
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Subset selected from a population for study
A
Mode
B
Correlation
C
Sample
D
Coefficient of variation
Correct Answer: C. Sample
Question: Which of the following is best described as: Subset selected from a population for study
A. Mode
B. Correlation
C. Sample
D. Coefficient of variation
Correct Answer: C. Sample
Explanation: The correct answer is Sample. Subset selected from a population for study
QID #26272
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Population?
A
Sum of observations divided by the number of observations
B
Difference arising because a sample rather than the whole population is observed
C
Complete set of units or observations of interest
D
Middle value after arranging observations in order
Correct Answer: C. Complete set of units or observations of interest
Question: Which statement best explains Population?
A. Sum of observations divided by the number of observations
B. Difference arising because a sample rather than the whole population is observed
C. Complete set of units or observations of interest
D. Middle value after arranging observations in order
Correct Answer: C. Complete set of units or observations of interest
Explanation: Population: Complete set of units or observations of interest
QID #26271
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Complete set of units or observations of interest
A
Population
B
Coefficient of variation
C
Census
D
Normal distribution
Correct Answer: A. Population
Question: Which of the following is best described as: Complete set of units or observations of interest
A. Population
B. Coefficient of variation
C. Census
D. Normal distribution
Correct Answer: A. Population
Explanation: The correct answer is Population. Complete set of units or observations of interest
QID #26270
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which statement best explains Regression?
A
Difference arising because a sample rather than the whole population is observed
B
Statistical method for modelling relationship between dependent and explanatory variables
C
Average squared deviation from the mean, according to the chosen population or sample formula
D
Events that cannot occur simultaneously
Correct Answer: B. Statistical method for modelling relationship between dependent and explanatory variables
Question: Which statement best explains Regression?
A. Difference arising because a sample rather than the whole population is observed
B. Statistical method for modelling relationship between dependent and explanatory variables
C. Average squared deviation from the mean, according to the chosen population or sample formula
D. Events that cannot occur simultaneously
Correct Answer: B. Statistical method for modelling relationship between dependent and explanatory variables
Explanation: Regression: Statistical method for modelling relationship between dependent and explanatory variables
QID #26269
UPSC UPSC EPFO APFC 2026 Mock Test Series UPSC EPFO APFC Statistics Sectional Test 2026 Medium
Which of the following is best described as: Statistical method for modelling relationship between dependent and explanatory variables
A
Regression
B
Mode
C
Negative correlation
D
Standard deviation
Correct Answer: A. Regression
Question: Which of the following is best described as: Statistical method for modelling relationship between dependent and explanatory variables
A. Regression
B. Mode
C. Negative correlation
D. Standard deviation
Correct Answer: A. Regression
Explanation: The correct answer is Regression. Statistical method for modelling relationship between dependent and explanatory variables
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
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