EDEXCEL AS LEVEL MATHEMATICS PAPER 21:
STATISTICS COMPLETE COMPREHENSIVE ACTUAL
FINAL PRACTICE EXAM PREP WITH REAL WELL
ELABORATED AND MOST TESTED EVALUATION 300
PRACTICE QUESTIONS AND 100% CORRECT
VERIFIED ANSWERS FULLY SOLVED (BASED ON
OFFICIAL IDOI OUTLINE) WITH ACCURATE
RELIABLE RATIONALES PLUS APPROVED ANSWER
KEY (100% COMPLETE SOLUTIONS) LATEST
UPDATED VERSION 2026-2027 Q&A 93% SCORE AND
ABOVE INSTANT DOWNLOAD PDF
Question 1
What is the main advantage of taking a census over
a sample?
A) It is less time-consuming
B) It gives a completely accurate result for the
population
C) It is cheaper to conduct
D) It requires less data processing
Correct Answer: B
,Rationale: A census observes every member of the
population, which should give a completely accurate
result. However, it is time-consuming, expensive,
and produces large amounts of data to process.
Sampling is cheaper and quicker but may be less
accurate.
Question 2
Which of the following is a disadvantage of using a
sample rather than a census?
A) It is more expensive
B) It takes more time
C) It may not be as accurate
D) It is harder to process data
Correct Answer: C
Rationale: The main disadvantage of a sample is
that the data may not be as accurate as a census
because it only represents a subset of the
,population. Sampling is generally cheaper, quicker,
and easier to process than a census.
Question 3
What is a sampling frame?
A) The whole set of items of interest
B) A selection of observations taken from a subset
of the population
C) A list of individually named or numbered
sampling units
D) An individual member of a population
Correct Answer: C
Rationale: A sampling frame is a list of individually
named or numbered sampling units from which a
sample is drawn. A population is the whole set of
items of interest, and a sampling unit is an
individual member of that population.
, Question 4
In stratified sampling, how is the number of units
selected from each stratum calculated?
A) (Number in stratum ÷ Overall sample size) ×
Population
B) (Number in stratum ÷ Population) × Overall
sample size
C) (Population ÷ Number in stratum) × Overall
sample size
D) (Overall sample size ÷ Population) × Number in
stratum
Correct Answer: B
Rationale: In stratified sampling, the number
selected from each stratum is proportional to its size
in the population. The formula is (number in stratum
÷ population) × overall sample size. This ensures
proportional representation of groups within the
population.
STATISTICS COMPLETE COMPREHENSIVE ACTUAL
FINAL PRACTICE EXAM PREP WITH REAL WELL
ELABORATED AND MOST TESTED EVALUATION 300
PRACTICE QUESTIONS AND 100% CORRECT
VERIFIED ANSWERS FULLY SOLVED (BASED ON
OFFICIAL IDOI OUTLINE) WITH ACCURATE
RELIABLE RATIONALES PLUS APPROVED ANSWER
KEY (100% COMPLETE SOLUTIONS) LATEST
UPDATED VERSION 2026-2027 Q&A 93% SCORE AND
ABOVE INSTANT DOWNLOAD PDF
Question 1
What is the main advantage of taking a census over
a sample?
A) It is less time-consuming
B) It gives a completely accurate result for the
population
C) It is cheaper to conduct
D) It requires less data processing
Correct Answer: B
,Rationale: A census observes every member of the
population, which should give a completely accurate
result. However, it is time-consuming, expensive,
and produces large amounts of data to process.
Sampling is cheaper and quicker but may be less
accurate.
Question 2
Which of the following is a disadvantage of using a
sample rather than a census?
A) It is more expensive
B) It takes more time
C) It may not be as accurate
D) It is harder to process data
Correct Answer: C
Rationale: The main disadvantage of a sample is
that the data may not be as accurate as a census
because it only represents a subset of the
,population. Sampling is generally cheaper, quicker,
and easier to process than a census.
Question 3
What is a sampling frame?
A) The whole set of items of interest
B) A selection of observations taken from a subset
of the population
C) A list of individually named or numbered
sampling units
D) An individual member of a population
Correct Answer: C
Rationale: A sampling frame is a list of individually
named or numbered sampling units from which a
sample is drawn. A population is the whole set of
items of interest, and a sampling unit is an
individual member of that population.
, Question 4
In stratified sampling, how is the number of units
selected from each stratum calculated?
A) (Number in stratum ÷ Overall sample size) ×
Population
B) (Number in stratum ÷ Population) × Overall
sample size
C) (Population ÷ Number in stratum) × Overall
sample size
D) (Overall sample size ÷ Population) × Number in
stratum
Correct Answer: B
Rationale: In stratified sampling, the number
selected from each stratum is proportional to its size
in the population. The formula is (number in stratum
÷ population) × overall sample size. This ensures
proportional representation of groups within the
population.
