mean
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The mean is affected the most by an outlier.
Yes.Yes.Yes.Yes.
An outlier is a number in a data set that is not around all the other numbers in the data. It will always affect the average; sometimes raising the average to a number higher than it should be, or lowering the average to something not reasonable. Example: Data Set - 2,2,3,5,6,1,4,9,31 Obviously 31 is the outlier. If you were to average these numbers it would be something greater than most of the numbers in your set due to the 31.
The outlier is the value that is really far off, for example say you had playing times of songs and most songs were 2 - 4 minutes, but one was 17 minutes, then this would be your outlier. I Hope this helps!
coefficient of variation