Computing the median with uncertainty

  title={Computing the median with uncertainty},
  author={Tom{\'a}s Feder and Rajeev Motwani and Rina Panigrahy and Christopher Olston and Jennifer Widom},
We consider a new model for computing with uncertainty. It is desired to compute a function f(X1; : : : ;Xn) where X1; : : : ;Xn are unknown, but guaranteed to lie in speci ed intervals I1; : : : ; In. It is possible to query the precise value of any Xj at a cost cj. The goal is to pin down the value of f to within a precision at a minimum possible cost. We focus on the selection function f which returns the value of the kth smallest argument. We present optimal o ine and online algorithms for… CONTINUE READING