Math 7 · Unit 16: Interpreting and discussing results · Cambridge Lower Secondary Maths Stage 7

Questions

1. 1. Question 1a: Which type of diagram, graph or chart is best to display the data: line graph, bar chart, scatter graph or dual bar chart? The data: the number of adult and child tickets sold at a theme park on two different days.

   • bar chart
   • scatter graph
   • line graph
   • dual bar chart
   Check

2. 2. Question 1b: Which type of diagram, graph or chart is best to display the data: line graph, bar chart, scatter graph or dual bar chart? The data: the amount of electricity produced by wind power in five countries.

   • bar chart
   • line graph
   • dual bar chart
   • scatter graph
   Check

3. 3. Question 1c: Which type of diagram, graph or chart is best to display the data: line graph, bar chart, scatter graph or dual bar chart? The data: the change in sales of cellular phones over time.

   • dual bar chart
   • line graph
   • scatter graph
   • bar chart
   Check

4. 4. Question 1d: Which type of diagram, graph or chart is best to display the data: line graph, bar chart, scatter graph or dual bar chart? The data: the exam scores for 12 students in music and maths.

   • line graph
   • scatter graph
   • dual bar chart
   • bar chart
   Check

5. 5. Question 2b: Allana's table shows the number of each item she collects for recycling. Which type of chart is best to display this data?

   • a line graph
   • a dual bar chart
   • a scatter graph
   • a bar chart
   Check

6. 6. Question 2c: Which comment about Allana's data is correct?

   • She collects more cans than plastic bottles.
   • She collects more plastic bottles than any other item.
   • She collects the same number of cartons and glass bottles.
   • Newspapers are the most common item.
   Check

7. 7. Question 3b: Which type of diagram is best to show which girls entered one, two or all three tournaments?

   • a line graph
   • a scatter graph
   • a bar chart
   • a Venn diagram
   Check

8. 8. Question 3c: Who entered all three tournaments?

   • Gail
   • Bea
   • Ana
   • Fi
   Check

9. 9. Question 4b: Which type of graph is best for the height and age of the ten trees, and why?

   • a pie chart: the heights are proportions
   • a line graph: the trees grow every month
   • a scatter graph: each tree has two values to compare
   • a bar chart: each tree is a category
   Check

10. 10. Question 4c: Which comment about the trees is correct?

    • Every tree is more than 5 m tall.
    • In general, the older the tree, the taller it is.
    • The tree aged 1 year is 6 m tall.
    • In general, the older the tree, the shorter it is.
    Check

11. 11. Question 5b: Sadie wants a graph that compares the colours and also shows the total landed on for each colour. Which is best?

    • a single bar chart of the butterflies
    • a compound bar chart
    • a line graph
    • a scatter graph
    Check

12. 12. Question 5c: Which comment about Sadie's results is correct?

    • Red flowers are landed on 4 times in total.
    • Yellow flowers are landed on most (20 times).
    • Butterflies land more often than bees.
    • Blue flowers are landed on most.
    Check

13. 13. Question 6b: Which graph is best for the monthly temperatures in Cape Town, and why?

    • a line graph: it shows how the temperature changes over the year
    • a pie chart: each month is a sector
    • a scatter graph: it compares two sets of data
    • a bar chart: each month is a separate category
    Check

14. 14. Question 6c: Which comment about the temperatures is correct?

    • The temperature is the same in every month.
    • It is warmest in January (22 °C).
    • It is warmest in February (23 °C) and coldest in July (12 °C).
    • It is warmest in July and coldest in February.
    Check

15. 15. Question 7b: Which type of diagram is best for Prakash's heights, which are grouped into classes?

    • a scatter graph
    • a dual bar chart
    • a line graph
    • a frequency diagram
    Check

16. 16. Question 7c: Which comment about Prakash's results is correct?

    • Most students are taller than 150 cm.
    • There are 40 students.
    • The modal group is 140–149 cm.
    • The modal group is 130–139 cm.
    Check

17. 17. Question 7d: Prakash estimates that 18 students are more than 135 cm tall. How did he work this out?

    • Half of the 130–139 group (6) plus 8 + 4 = 18
    • All of the 130–139 group (12) plus 8 + 4 = 24
    • 30 − 12 = 18
    • 12 + 6 = 18
    Check

18. 18. Question 8b: When is a pie chart the best choice for this data?

    • to show how hair colour changes over time
    • to compare girls and boys side by side
    • to show the proportion of the class with each hair colour
    • to show a relationship between two measurements
    Check