THE MEAN

THE MEAN

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THE MEAN - UNDERSTANDING

The Mean


To find the mean, you need to add up all the NUMBERS, and then divide this total by the number of values in the data.

Adding the numbers up gives:
2 + 2 + 3 + 5 + 5 + 7 + 8 = 32

There are 7 values, so you divide
the total by 7:    32 ÷ 7 = 4.57...

So the mean is 4.57 

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The Median

The Median


To find the median, you need to put the NUMBERS in order, then find the middle NUMBER. If there are two NUMBERS in the middle
then you find the mean of these two NUMBERS.

The numbers in order:
2 , 2 , 3 , (5) , 5 , 7 , 8

The middle value is marked in
brackets, and it is 5.

So the median is 5

The numbers in order:
2 , 3 , (3 , 4) , 6 , 7

This time there are two values in
the middle. They have been put
in brackets. The median is found
by calculating the mean of these
two values:    (3 + 4) ÷ 2 = 3.5

So the median is 3.5

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