Key Stage 3
Maths
Numerical summaries of data

Starter quiz

  • Which of these sentences describe the range?
    • A measure of spread  ✓
    • A measure of central tendency
    • A measure of variance or varity  ✓
    • It is found by finding the difference between the highest and lowest values  ✓
    • It is found by putting a data set into size order and finding the middle value
  • Match the key parts of a calculation for the range with the correct values for this data set: 6, 3, 10, 4, 9, 1, 4
    • The largest value is
      ⇔
      10 ✓
    • The smallest value is
      ⇔
      1 ✓
    • Calculation to find range
      ⇔
      10 − 1 ✓
    • The range is
      ⇔
      9 ✓
    • Number not used to find range
      ⇔
      4 ✓
  • Select the correct calculation to find the range of this data set: 19, 12, 16, 19, 9, 11
    • {{19 + 16}\over{2}} = 17.5
    • {{12 + 16}\over{2}} = 14
    • {{19 + 12 + 16 + 19 + 9 + 11}\over{6}} = 14.\dot3
    • {19 - 9} = 10  ✓
    • {19 - 11} = 8
  • Match each data set to its range.
    • 1, 3, 7, 8, 10
      ⇔
      9 ✓
    • 3, 1, 10, 10, 12
      ⇔
      11 ✓
    • 3, 9, 11, 15, 14
      ⇔
      12 ✓
    • 4, 9, 8, 7, 7, 14, 12, 13
      ⇔
      10 ✓
  • A data set is presented on a dot plot. The range of the data is <span class="blank">______</span>.
    A data set is presented on a dot plot. The range of the data is ______.
    • '7' ✓
  • Which of these dot plots have a range of 6?
    • a
      a
    • b
      b  ✓
    • c
      c  ✓
    • d
      d
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