Unit 18 Section 4 : Comparing Data
In this section we consider how averages and the range can be used to compare sets of data.
Example Questions
Work out the answer to each of these questions then click on the button marked
to see whether you are correct.
Example Question 1
The two line diagrams below illustrate data that was collected about the scores of two groups of children in a short test.
(a) What is the mode for group A?
(b) What is the mode for group B?
(c) What is the range for group A?
(d) What is the range for group B?
(e) Which class did worse in the test?
(f) Which class had more varied results?
Example Question 2
Kathryn plants two different types of tomato plant. She records the number of
tomatoes that she picks from each plant every day for 10 days. Her records are
shown below:
(a) Calculate the mean for Plant A
(b) Calculate the mean for Plant B
(c) Calculate the range for Plant A
(d) Calculate the range for Plant B
(e) Which plant produces more tomatoes on average?
(f) Which plant has the more consistent yield of tomatoes?
Exercises
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
to see
the answer.
You have now completed Unit 18 Section 4
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.

Return to the Y7 Tutorials Menu
Produced by A.J.Reynolds April 2011
