StatGrid ChallengeArrange the numbers one to nine in a three by three grid to obtain the given means, medians and ranges. 
Drag the numbers into the yellow cells to make the given row and column statistics.
Three numbers have already been placed on the grid.
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The statistics of each row and column should be as given.
Press the Clear button and try again.
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This is StatGrid Challenge level 5. You can also
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To find the mean of a set of values add them together then divide by the number of values.
Example: find the mean of 8,9,10: 8+9+10=27, 27÷3=9: The mean is 9
To find the median of a set of values arrange them in order then choose the middle value. If their are two middle values select the answer that is half way between those values.
Example: find the median of 4,12,7,6: In order 4,6,7,12: (6+7)÷2: The median is 6.5
A formula for finding which is the middle value if there are N values is (N+1)/2. You can see why there is an 'add one' here.
The range of a set of values is the smallest value subtracted from the largest.
Example: find the range of 2,4,4,1: 41=3: The range is 3.
More Averages activities.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you donâ€™t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
There is a selfmarking exercise on Averages and Range and here is the video that was made for that exercise:
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