EDEXCEL MATHS AS STATISTICS QUESTIONS
AND ANSWERS PROVIDED. 2024/2025
UPDATE
1 . Population: Whole set of items at interest
2. Census: Every member of the
population
3. Census advantages: - Unbiased and
accurate.
- Takes the whole population into account.
4. Census disadvantages: -Time consuming and expensive
-Hard to process large quantity of data
-Data must be cleaned
5. Sampling unit: Individual units of a population
6. Sampling frame: Named/numbered units to form a list
7. Random sample examples: -Simple random -Systematic
8. Non-random sample examples: -Quota
-Opportunity
-Stratified
9. Simple random sampling: Random, equal chance of selection
10. Systematic sampling: 1 st randomly selected, then selected at
regular intervals 1 1 . Quota sampling: Select a number of units with
defined characteristics that reflect the population
12. Opportunity sampling: Select conveniently available that fit criteria
13. Stratified sampling: Population divided into groups, and the number
selected from each group is proportional to the size
14. Continuous variable: Any number within a range 15. Discrete
variable: Only specific values in a range
16. Quantitative: Numerical
1/9
, EDEXCEL MATHS AS STATISTICS QUESTIONS
AND ANSWERS PROVIDED. 2024/2025
UPDATE
17. Qualitative: Non-numerical
18. Mean: sum x/ n
x n
19. Mean in frequency tables: sum (frequency * data value) / sum
(frequency * midpoint)
20. Median: Q2
21 . Median definition: Middle value
22. Range: Difference between smallest and largest
23. IQR: Q3 - QI
24. Interpolation: Lower boundary + ((place in class / class frequenc
width)
25. Standard deviation: Measure of spread
26. Standard deviation equation:
27. Standard deviation on a calculator: [MENU] [6] y = a + bx
Data into table [AC]
[OPTN] [3]
28. Variance: Sxx / n
29. Sxx calculation: Sum xA2 - ((sum xA2) / n) 2
n
30. Sxy calculation: Sum x*y - ((sum x*y) / n) - = sxy
2/9
AND ANSWERS PROVIDED. 2024/2025
UPDATE
1 . Population: Whole set of items at interest
2. Census: Every member of the
population
3. Census advantages: - Unbiased and
accurate.
- Takes the whole population into account.
4. Census disadvantages: -Time consuming and expensive
-Hard to process large quantity of data
-Data must be cleaned
5. Sampling unit: Individual units of a population
6. Sampling frame: Named/numbered units to form a list
7. Random sample examples: -Simple random -Systematic
8. Non-random sample examples: -Quota
-Opportunity
-Stratified
9. Simple random sampling: Random, equal chance of selection
10. Systematic sampling: 1 st randomly selected, then selected at
regular intervals 1 1 . Quota sampling: Select a number of units with
defined characteristics that reflect the population
12. Opportunity sampling: Select conveniently available that fit criteria
13. Stratified sampling: Population divided into groups, and the number
selected from each group is proportional to the size
14. Continuous variable: Any number within a range 15. Discrete
variable: Only specific values in a range
16. Quantitative: Numerical
1/9
, EDEXCEL MATHS AS STATISTICS QUESTIONS
AND ANSWERS PROVIDED. 2024/2025
UPDATE
17. Qualitative: Non-numerical
18. Mean: sum x/ n
x n
19. Mean in frequency tables: sum (frequency * data value) / sum
(frequency * midpoint)
20. Median: Q2
21 . Median definition: Middle value
22. Range: Difference between smallest and largest
23. IQR: Q3 - QI
24. Interpolation: Lower boundary + ((place in class / class frequenc
width)
25. Standard deviation: Measure of spread
26. Standard deviation equation:
27. Standard deviation on a calculator: [MENU] [6] y = a + bx
Data into table [AC]
[OPTN] [3]
28. Variance: Sxx / n
29. Sxx calculation: Sum xA2 - ((sum xA2) / n) 2
n
30. Sxy calculation: Sum x*y - ((sum x*y) / n) - = sxy
2/9
