Starter quiz
- Work out: = ______
- '34' ✓
- Work out: = ______
- '19' ✓
- Work out: = ______
- '44.1' ✓
- ______ are a collection of information.
- 'Data' ✓
- Two numbers have a difference of 10. The smaller number is 53. The other number is ______
- '63' ✓
- Two positive numbers have a difference of 8. One of the numbers is 6. The other number is ______
- '14' ✓
Exit quiz
- The range is a measure of spread. It is found by finding the ______ between the two extreme points; the lowest and highest values.
- 'difference' ✓
- Select the data sets where you can calculate a range.
- 4, 7, 5, 8, 3, 1, 0 ✓
- cat, dog, rabbit, dog, cat, rabbit, hamster
- -4, -2, -5, -1, 0, -7 ✓
- 5, 5, 5, 5, 5, 5, 5, 5, 5 ✓
- ash, birch, oak, maple, sycamore, oak
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- A large data set has the extreme values of 24.6 and 59.2. The range of the data set is ______.
- '34.6 ' ✓
- Which of these dot plots is most varied?
This line graph shows data about journey times to school over a week. The range of the journey times is ______ minutes.- '7' ✓
- Which of these bar charts show data with a range of 4?
Worksheet
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Presentation
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Lesson Details
Key learning points
- The range is a measure of spread.
- The range is difference between the highest and lowest data point.
- The range shows how spread out (far apart) the extreme values in the data set are.
Common misconception
Pupils may often write the range as '3 to 10' or '10 - 3' rather than a single value.
Remind pupils that the range is a single value which describes how far apart the extreme values are.
Keywords
Range - The range is a measure of spread. It is found by finding the difference between the highest and lowest values.
Spread/dispersion - The spread/dispersion of data values describes how far apart the pieces of data are.
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