A Confidence Interval For $\left( \mu _ { 1 } - \mu _ { 2 } \right)$

Multiple Choice

A confidence interval for $\left( \mu _ { 1 } - \mu _ { 2 } \right)$ is $( - 5,8 )$ . Which of the following inferences is correct?

A) $\mu _ { 1 } = \mu _ { 2 }$
B) $\mu _ { 1 } > \mu _ { 2 }$
C) $\mu _ { 1 } < \mu _ { 2 }$
D) no significant difference between means