Cambridge Mathematics 9: Planning and collecting data

10 questions with solutions on the Cambridge Mathematics 9 topic: types of data, primary and secondary data, samples, bias, questionnaires, grouping.

Type the number or choose the right answer. When you finish, click Check answers and see the solutions.

1. A pupil's height (in cm) is data that is:

A. continuous

B. discrete

C. qualitative

D. not data

2. The number of brothers and sisters is data that is:

A. continuous

B. qualitative

C. secondary

D. discrete

3. Which is primary data?

A. a table from the national statistics office

B. data from a newspaper

C. a survey a pupil does in class

D. data from the internet

4. To find the favourite sport in a school, only the basketball team is asked. The sample is:

A. random

B. biased

C. representative

D. too large

5. A school has 600 pupils. How many pupils are in a 10% sample?Enter a number only

6. Of 600 pupils, 120 are in grade 9. In a sample of 50, how many should be from grade 9 (in proportion)?Enter a number only

7. A tally shows 4 groups of 5 and 2 more marks. What is the frequency?Enter a number only

8. Which grouping for time (in minutes) is good?

A. 0–10, 10–20

B. 0 ≤ t < 10, 10 ≤ t < 20

C. 0 ≤ t ≤ 10, 10 ≤ t ≤ 20

D. 0–9, 11–20

9. Which survey question is best?

A. How many hours do you sleep? (less than 7 / 7–8 / more than 8)

B. Don't you agree sport is the best hobby?

C. How much do you sleep? (a little / a lot)

D. How old are you? (10–12 / 12–14 / 14–16)

10. Which is secondary data?

A. measuring heights in class

B. counting cars outside school

C. your own survey

D. population figures from the census