Unit 18 Section 3 : Measures of Central Tendency
Dispersion is how spread out a set of data are. One measure of dispersion is the range.
The range is the difference between the highest and lowest values in the data set.
Range = Highest Value - Lowest Value
Look at this data:
The highest value is 22 and the lowest value is 3, so the range is 22 - 3.
The range of this data is 19
Work out the answer to the questions below then click
to see whether you are correct.
(a) What is the range of the data illustrated in the vertical line diagram on the right?
(b) Look at the values below.-5, -3, 2, 4, 6, 7, 9
What is the range of these data?
Work out the answers to the questions below and fill in the boxes. Click on the
button to find out whether you have answered correctly. If you are right
then will appear and you should move on to the next
question. If appears then your answer is wrong. Click
on to clear your original answer and have another go.
If you can't work out the right answer then click on
You have now completed Unit 18 Section 3
Return to the Tutorials Menu
Since these pages are under
development, we find any feedback extremely valuable. Click
here to fill out a very short form which allows you make comments about
the page, or simply confirm that everything works correctly.
Produced by A.J. Reynolds January 2001