Find the mean of the data set 31,31,22,28,23?

The mean is 27 
How you do this is you add all the numbers together even the ones that are duplicated like in this case 31. Now add em all up which equals 135. Now you take the number that they equal up to and divide by how many numbers are in the set of data in this case it is 5. After dividing you get 27.
I hope this helps!

27 because you add them all together and get 135 and divide that by how many numbers there are which is 5 and you get 27:)

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