Developing essential understanding of statistics for teaching mathematics in grades 9-12 / Roxy Peck, California Polytechnic State University, San Louis Obispo, California, Robert Gould, University of California-Los Angeles, Los Angeles, California, Stephen J. Miller, Winchester Thurston School, Pittsburgh, Pennsylvania ; Patricia S. Wilson, volume editor, University of Georgia, Athens, Georgia ; Rose Mary Zbiek, series editor, The Pennsylvania State University, University Park, Pennsylvania.