I Nondirectional, Two-Tail tests Ho pop parameter=value H1: pop parameter value Do Not Reject H Reject H Reject H 0 0 2 杬 Z o 2002 The Wadsworth GroupNondirectional, Two-Tail Tests H0 : pop parameter = value H1 : pop parameter  value a −a a 杬 +z Do Not Reject H 0 Reject H 0 Reject H 0 © 2002 The Wadsworth Group