Suppose That a Z Test Of $H _ { 0 } : \mu = \mu _ { 0 } \text { ver sus } H _ {o } : \mu < \mu _ { 0 }$

Essay

Suppose that a z test of $H _ { 0 } : \mu = \mu _ { 0 } \text { ver sus } H _ {o } : \mu < \mu _ { 0 }$ is conducted. The critical value $z _ { \boldsymbol { \alpha } }$ is determined by specifying __________ and using the fact that $Z = \left( \bar { X } - \mu _ { 0 } \right)/ ( \sigma / \sqrt { n } )$ has a __________ distribution when $H _ { o }$ is true.