High School Maths Examples and Questions

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Averages: Mean, Median and Mode

Averages give us the "common" value in a set of data. There are 3 ways to measure the average:

1.  Mean
 is the most commonly used average. It is calculated by adding up the set of values and then dividing that sum, by the number of values used:
Mean =
Where the symbol Σ is sum
 
2.  Median
 order the set of values by size then work out the middle
value
 
3.  Mode
 the value that occurs most often

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