EDEXCEL A LEVEL STATISTICS PAPER 3 2026
MOCK EXAM PRACTICE SET WITH
SOLUTIONS A+
◉ What is a qualitative variable? Answer: A variable associated with
non-numerical observations.
◉ What is continuous data? Answer: Data that can take any value on
a given range. e.g. height, weight, length etc.
◉ What is discrete data? Answer: Data that can only take specific
values. e.g. shoe size, number of people, colour.
◉ What is the formula for Mean from a Frequency Table? Answer:
◉ What are the steps in calculating the Mean from a Frequency
Table? Answer: 1) Add a column for midpoints, x.
2) Multiply the frequencies by midpoints and add to the fx column.
3) Add up the fx column.
4) Divide the sum of the fx column by the total frequency.
, ◉ How is the Interquartile Range calculated? Answer: Upper
Quartile - Lower Quartile
◉ What is the formula for Standard Deviation for a list of numbers?
Answer:
◉ What are the steps in calculating the Standard Deviation for a list
of numbers? Answer: 1. Add up all the values of x, this is ∑x
2. Square all the values and add up, this is ∑x²
3. Count the number of values, this is n.
4. Substitute all these values into the formula.
◉ What is the formula for Standard Deviation for a Frequency Table?
Answer:
◉ What are the steps in calculating the Standard Deviation from a
Frequency Table? Answer: 1. Calculate the mean.
2. Square all the midpoints and multiply by the frequency. Add up all
these values, this is ∑ƒx².
3. Divide ∑ƒx² by the total frequency and subtract the mean squared.
4. Square root.
◉ How is the standard deviation found if you know the variance?
Answer: Square root it.
MOCK EXAM PRACTICE SET WITH
SOLUTIONS A+
◉ What is a qualitative variable? Answer: A variable associated with
non-numerical observations.
◉ What is continuous data? Answer: Data that can take any value on
a given range. e.g. height, weight, length etc.
◉ What is discrete data? Answer: Data that can only take specific
values. e.g. shoe size, number of people, colour.
◉ What is the formula for Mean from a Frequency Table? Answer:
◉ What are the steps in calculating the Mean from a Frequency
Table? Answer: 1) Add a column for midpoints, x.
2) Multiply the frequencies by midpoints and add to the fx column.
3) Add up the fx column.
4) Divide the sum of the fx column by the total frequency.
, ◉ How is the Interquartile Range calculated? Answer: Upper
Quartile - Lower Quartile
◉ What is the formula for Standard Deviation for a list of numbers?
Answer:
◉ What are the steps in calculating the Standard Deviation for a list
of numbers? Answer: 1. Add up all the values of x, this is ∑x
2. Square all the values and add up, this is ∑x²
3. Count the number of values, this is n.
4. Substitute all these values into the formula.
◉ What is the formula for Standard Deviation for a Frequency Table?
Answer:
◉ What are the steps in calculating the Standard Deviation from a
Frequency Table? Answer: 1. Calculate the mean.
2. Square all the midpoints and multiply by the frequency. Add up all
these values, this is ∑ƒx².
3. Divide ∑ƒx² by the total frequency and subtract the mean squared.
4. Square root.
◉ How is the standard deviation found if you know the variance?
Answer: Square root it.
