Department of Statistics, University of California, One Shields Avenue, Davis, CA 95616, USA. mueller@wald.ucdavis.edu|Department of Statistics, University of California, One Shields Avenue, Davis, CA 95616, USA. mueller@wald.ucdavis.edu|Department of Statistics, University of California, One Shields Avenue, Davis, CA 95616, USA. mueller@wald.ucdavis.edu