In this paper, we consider the problem of interval estimation for the mean of diagnostic test charges. Diagnostic test charge data may contain zero values, and the nonzero values can often be modeled ...

Interval-censored data occur when subjects are assessed by using regular follow-up. In such instances, we consider rank-invariant permutation tests to test the significance of a treatment versus a ...

Editor’s note: Robert J. Moore is the co-founder of RJMetrics, a company whose software helps online businesses make smarter decisions using their own data. He also previously served on the Investment ...