What this quiz covers

Grade 8 Data Handling Quiz 1 draws its questions at random from 17 questions across these topics:

• Data Cycle & Questions
• Population vs Sample
• Categorical Data
• Numerical Data
• Central Tendency
• Spread & Quality

Example questions

A sample of the questions you will practise in this quiz. Work them out yourself - the full solution appears after you answer each one.

1. Which of these is the LEAST biased statistical question?
2. A researcher wants to know the average screen time of all 400 Grade 8 learners at a school, but only interviews 40 of them. What is the SAMPLE?
3. A researcher wants to know the average screen time of all 400 Grade 8 learners at a school. What is the POPULATION?
4. A researcher only surveys learners who are already waiting at the school gate before 7am. What type of sample is this?
5. Five learners name their favourite subject: Maths, Science, Maths, English, Maths. What is the frequency of "Maths"?