Two-way tables (AQA GCSE Statistics): Flashcards
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Practise the cards
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What is a two-way table used for in statistics?
What is a two-way table used for in statistics?
It organizes data by two categories to show patterns.
How do you calculate probability from a two-way table?
How do you calculate probability from a two-way table?
Use: P = Successful outcomes / Total outcomes.
What do row totals represent in a two-way table?
What do row totals represent in a two-way table?
They show the sum of frequencies for each row category.
If 10 chose jam, what is P(jam) from 32 total?
If 10 chose jam, what is P(jam) from 32 total?
P(jam) = 10/32 = 0.3125.
How to find the most likely outcome in a table?
How to find the most likely outcome in a table?
Look for the highest frequency in the relevant category.
What is the grand total in a two-way table?
What is the grand total in a two-way table?
It's the total of all row or column totals combined.
What to do if a two-way table is incomplete?
What to do if a two-way table is incomplete?
Fill missing values ensuring row/column totals match.
What is P(tyres in January) if 15 out of 75?
What is P(tyres in January) if 15 out of 75?
P(tyres in January) = 15/75 = 0.2.
What is the benefit of simplifying fractions in statistics?
What is the benefit of simplifying fractions in statistics?
It makes calculations easier and results clearer.
What common mistake involves totals in calculations?
What common mistake involves totals in calculations?
Using the wrong total, like grand instead of row/column.