Strata (AQA GCSE Statistics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is a stratum in statistics?
What is a stratum in statistics?
A distinct group with common traits
Why is proportional representation important?
Why is proportional representation important?
It ensures accurate sample reflection
What is the formula to calculate sample size for a stratum?
What is the formula to calculate sample size for a stratum?
Stratum size divided by total size
In a gym with 200 members, how many males in a sample of 40 if 120 are male?
In a gym with 200 members, how many males in a sample of 40 if 120 are male?
24 males
What is the total number of children in the primary school example given in the notes?
What is the total number of children in the primary school example given in the notes?
80 children
In a sample of 20 children, how many are from Class B if it has 35% of the total?
In a sample of 20 children, how many are from Class B if it has 35% of the total?
7 children
What to do with decimal results in sample size?
What to do with decimal results in sample size?
Round to nearest whole number
What is a sampling frame?
What is a sampling frame?
A list of population members
What is the main advantage of stratified sampling?
What is the main advantage of stratified sampling?
It guarantees all groups are represented
What is the ratio of boys to girls in the gym example?
What is the ratio of boys to girls in the gym example?
3:2