Mean: e.g the numbers are 5, 3, 9, 3. First you ad all the numbers together which is: 20 then you divide 20 by how many numbers you had to add which is 4 so you do 20 divided by 4 which makes 5 and that is the final answer

Median: e.g: if you use 6, 7, 2, 5 and 4 you will have to order them smallest to biggest which would be 2, 4, 5, 7 and 9. The next thing you do is identify the number that is in the middle of it which in this case would be 5, and that is the median

Mode: The mode is the amount of numbers you see the most e.g if the numbers were: 4, 7, 9, 7 the mode would be 7 as you see seven twice, but if you took out one of the 7's there would be now mode.

Range: the range is getting the biggest number and subtracting the smallest number from it. e.g 4, 7, 7, 9.

The biggest number is 9 and the smallest is 4 so you would subtract 4 from 9 which is 5 and that is the range.

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