I'm looking for an umbrella term for the maximum, the minimum, the median and the average of a sequence of numbers.
For the maximum and the minimum, such a term would, for example, be the extremum (Term for minimum or maximum).
For the median and the average, one could use measure of central tendency (http://www.quickmba.com/stats/centralten/).
A very generic term for all four words would be just measure.
Is there a more specific term?