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The mean is the most common measure of average. If you ask someone to find the average, this is the method they are likely to use.

Kieran's results were:

9 13 9 11 9 13 11 9 10 8 11

To calculate the mean:

Add the numbers together and divide the total by the amount of numbers.


The median is the middle number. To calculate the median of any set of numbers, you need to write the numbers in order.

To find the…


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