Maths-Averages The numbers: 2,5,3,2,6,-4,0,9,-3,1,6,3,-2,3

Maths-Averages The numbers: 2,5,3,2,6,-4,0,9,-3,1,6,3,-2,3

Annotations:

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1. Mean
   1. Total of items/number of items
   2. Mean is just the average, but it's mean 'cos you have to work it out
   3. Example: -4-3-2+0+1+2+2+3+3+3+5+6+6+9 /14 =31/14 =2.21 (3 s.f.)
2. Mode
   1. Most common
   2. Most (emphasis the 'mo' in each when you say them)
   3. Most common value is 3
3. Median
   1. Middle value (when in order of size)
   2. Mid (emphasise the m*d in each when you say them)
   3. Rearrange them so, -4,-3,-2,0,1,2,2,3,3,3,5,6,6,9 Seven numbers at each side so that gets you to 2&3 Median=2.5
4. Range
   1. The difference between highest and lowest
   2. From -4 to 9 =9-(-4) =13