Collecting and classifying data Quiz

1. Which of these is continuous data?

• A. The number of pets in a home
• B. The time taken to run $100$ m
• C. A student's shoe size
• D. A student's favourite colour

2. A school has $500$ students: $300$ girls and $200$ boys. A stratified sample of $50$ students is taken. How many boys should it include?

• A. $30$
• B. $25$
• C. $20$
• D. $10$

3. A systematic sample of $30$ customers is taken from a list of $600$. How often should a customer be chosen from the list?

• A. Every $20$th
• B. Every $30$th
• C. Every $10$th
• D. Every $200$th

4. Which is a leading question?

• A. How many hours did you sleep last night?
• B. Don't you agree that homework is far too long?
• C. How long does your homework take each evening?
• D. Do you get homework?

5. A researcher interviews shoppers outside a luxury shop to find the average household income in a city. What is the main problem?

• A. Income is categorical data
• B. The sample is too large
• C. Questionnaires are never reliable
• D. The sample is biased because it is not representative of the city