Which of the Following Represents a Null Hypothesis?
A) $H _ { 1 } : \bar { X } _ { 1 } > \bar { X } _ { 2 }$

Multiple Choice

Which of the following represents a null hypothesis?

A) $H _ { 1 } : \bar { X } _ { 1 } > \bar { X } _ { 2 }$
B) $H _ { 0 } : \mu _ { 1 } = \mu _ { 2 }$
C) $H _ { 1 : } : \bar { X } _ { 2 } \neq \bar { X } _ { 2 }$
D) $H _ { 0 } : \mu _ { 1 } > \mu _ { 2 }$