Melanie's Measures of Central Tendency
Mean - the average of a set of data
To find the mean:
1. arrange in ascending order (optional)
2. add all data together
3. divide the sum of all data, by how many pieces of data there are
4. the final result is the mean
if you have an outlier it will change the mean
To find the mean:
1. arrange in ascending order (optional)
2. add all data together
3. divide the sum of all data, by how many pieces of data there are
4. the final result is the mean
if you have an outlier it will change the mean
Median - the number in the middle of a set of data
To find the median:
1. arrange in ascending order (IMPORTANT)
2. cross out one piece of data from the left, then the right, then the left, and so on, until you reach the middle number
3. the final result is the median
if you have an even number of data, you'll end up with two middle numbers, so you need to find the middle of those two numbers (sum of two numbers, divided by 2)
if you have an outlier, use the median, instead of the mean, to find the average
Mode - the number in a set of data, that appears the most
To find the mode:
1. arrange in ascending order
2. find the number that appears the most
3. the final result is the mode
sometimes there could be MORE than one mode
sometimes there is NO mode
Range - the difference between the greatest and least piece of data in a set
To find the range:
1. arrange in ascending order
2. find the greatest and least piece of data
3. subtract the least piece of data from the greatest piece of data
4. the final result is the range
Here is a video, that shows how to find the mean, median, and mode:
Click here to play a game, that could help you remember how to find the mean, median, and mode.
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by the way, thanks to all the people for commenting :)
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