The document discusses order statistics such as the minimum, maximum, and median of a data set. It describes the selection problem of finding the ith smallest element. A naive solution is to sort the data, but a more efficient approach is presented to find the minimum and maximum in fewer than 2n-2 comparisons by processing elements in pairs. The randomized selection algorithm is then described to find the ith smallest element in expected linear time by partitioning the data around a randomly chosen pivot.