Nadja,

Here is the definition :
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Median
When the elements of a set of numbers have been arranged in ascending order, the number located in the middle of the set is the median of the set. The median divides the set of data into two equal parts...
If the set contains an even number of elements, the median is the average of the two middle numbers.
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And again, life does not make correction to math function. We have to choose the appropriate math function. For example, when you consider the driving strategy: half of the driving TIME with the speed V1, another half of the driving TIME with another speed V2, then the average speed is the arephmetic average. But if the driving strategy is : half of the DISTANCE with the speed V1, another half of the DISTANCE with another speed V2, then the average speed will not equal to the arithmetic average.


>Thanks for the reply, Yuri. Could you please check this definition for me in >those books, because I simply don't have them. I agree, that life may make >some corrections in math functions :)

>Besides, Andrew quoted the book of Theory of Probabilities... It's not the >same, as Financial Statistics, I believe...