- Arrange the data in ascending numerical order.
- Add up all the data.
- Divide the sum by how many pieces of data there are.
Median
- Arrange the data in ascending numerical order.
- Cross out the border numbers until you remain with one.
- In the occasion of there being 2 numbers, you add them and then divide by 2.
Mode
- Arrange the data in ascending numerical order.
- Find the most occurring number.
- Note that it is possible to have more than one mode.
( I guess this one is the same as the last picture. )
Range
- Arrange the data in ascending numerical order.
- Subtract the lowest number from the highest number.
Here is a video that explains mean, median and mode :
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