Math 8 · Unit 16: Interpreting and discussing results · Cambridge Lower Secondary Maths Stage 8

Questions

1. 1. Team A: mean 15, range 4. Team B: mean 15, range 12. Which is more consistent?

   • the same
   • Team B
   • Team A
   Check

2. 2. Data with one very large value: which average is best?

   • total
   • median
   • range
   • mean
   Check

3. 3. Shoe sales by size: which average helps a shop most?

   • median of prices
   • mean
   • range
   • mode
   Check

4. 4. Class X median 62, class Y median 70. Which did better on average?

   • class Y
   • the same
   • class X
   Check

5. 5. Range tells us about …

   • the total
   • how spread out the data is
   • the most common value
   • the typical value
   Check

6. 6. Salaries: $20k, $22k, $24k, $25k, $200k. Mean ≈ $58k. Is the mean typical?

   • No, the range is
   • Yes
   • No, the median ($24k) is more typical
   Check

7. 7. Plant A heights: mean 20 cm. Plant B: mean 25 cm. Conclusion?

   • Plant A is taller on average
   • Plant B is taller on average
   • both are equal
   • B is more consistent
   Check

8. 8. A small range means the data is …

   • large
   • wrong
   • spread out
   • consistent
   Check

9. 9. Two shops: A prices range $5, B range $30. Which has more varied prices?

   • A
   • B
   • the same
   Check

10. 10. When comparing two sets, you should comment on …

    • only the largest value
    • the colours
    • an average and the range
    • only the first value
    Check

11. 11. Which can't be found for categorical data like eye colour?

    • mode
    • mean
    • frequency
    • a bar chart
    Check

12. 12. Times (s): Ana 12, 13, 12, 14; Ben 10, 16, 11, 15. Who is more consistent?

    • Ben
    • the same
    • Ana
    Check

13. 13. Times (s): Ana 12, 13, 12, 14. What is Ana's mean time?

    • 12
    • 12.75
    • 51
    • 13
    Check

14. 14. Times (s): Ben 10, 16, 11, 15. What is Ben's mean time?

    • 52
    • 12.75
    • 11
    • 13
    Check

15. 15. In a race, a lower mean time is …

    • better
    • the same
    • impossible
    • worse
    Check