To find the mean of a dataset, you must follow 2 steps:
- Add all the numbers in the dataset.
- Divide by how many there are.
In this case, we must add
5+7+20+6+4+3+2+5+5+7
12+49+7
12+56
68
We have 10 numbers, so we divide by 10:
6.8 is the mean
For the median, we must simply find the number in the middle.
If we have an <em>even</em> number of numbers, we find the mean of the numbers in the middle.
It's 4&3:
4+3=7
7:2=3.5
So the median is 3.5
The mode is the numebr which is seen most often in the set.
Here it's 7 and 5 so the set has 2 modes.
Hope it helps! :)
