Compute rate estimates, a function to be passed on to bootstrap routine.
estimate_rate(data, indices, q, wtd.mean)
an estimate of RATE, together with the TOC curve.
A data.frame with the original data, column 1: DR.scores*sample.weights, column 2: sample.weights (positive), column 3: priority scores (integer vector with scores 1,...,num.unique.prios).
A vector of indices which define the bootstrap sample.
A vector of fractions to compute TOC on, with last entry = 1.
A weighting function determining the type of RATE estimate.