Two-way tables
AQA GCSE Maths revision on Two-way tables. Aligned to the AQA GCSE Mathematics 8300 specification. This bank has 16 practice questions on this topic.
Sample questions (3 of 16)
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Question 1
In a two-way table, what does the 'grand total' represent?
- A) The sum of all individual categories
- B) The frequency of the most common row
- C) The difference between two columns
- D) The mean of the entire dataset
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Answer: The sum of all individual categories
The grand total in a two-way table represents the sum of all row totals or all column totals. It accounts for every single piece of data collected across all categories in the survey.
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Question 2
If a row total is 50 and one cell in that row is 20, what must the other cell in that row be if there are only two columns?
- A) 30
- B) 70
- C) 1000
- D) 2.5
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Answer: 30
In a two-way table, individual cells within a row must add up to that row's total. Subtracting the known cell value from the total frequency gives the missing value.
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Question 3
A student calculates a cell value as -5 in a frequency two-way table. What is the most likely error?
- A) They subtracted the total from a part instead of a part from the total
- B) They misread the column header
- C) They calculated the mean instead of the sum
- D) They used the wrong row total
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Answer: They subtracted the total from a part instead of a part from the total
Frequencies represent counts of occurrences, which must always be positive integers. A negative result indicates the student reversed the subtraction order, such as calculating 'part minus total' instead of 'total minus part'.
Want to test yourself on the remaining cards for this topic?
13 more questions on Two-way tables — plus mistakes tracking and spaced repetition across the whole Maths spec.