Department of Statistics, University of Kentucky, 725 Rose Street, Lexington, KY 40536-0082, USA.|Department of Statistics, University of Kentucky, 725 Rose Street, Lexington, KY 40536-0082, USA.|Department of Statistics, University of Kentucky, 725 Rose Street, Lexington, KY 40536-0082, USA.|Department of Statistics, University of Kentucky, 725 Rose Street, Lexington, KY 40536-0082, USA.|Department of Statistics, University of Kentucky, 725 Rose Street, Lexington, KY 40536-0082, USA.