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I have a set of positive values and I need to increase or decrease this set by adding or reducing number of values. But I would like the mean of values is not altered much.

Example: I have this array {1,1,1,1,1,2,4,4,15,20} size is 10 I need size 8 or 16 (I always need pow of two) so not to alter too, I prefer to delete two values in this array, instead reaching size 16. How I chose this two value ?? The average may change a little bit, but not too.

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    If you delete two 4s, the mean will be 5.25, the closest to the original.2012-02-12
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    Please retag this question to "Probability-distribution". "Distribution-theory" is meant for generalized functions.2012-02-12

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