In Testing $H _ { o } : \mu _ { 1 } - \mu _ { 2 } = 0 \text { versus } H _ { a } : \mu _ { 1 } - \mu _ { 2 } \neq 0 \text {, }$

Short Answer

In testing $H _ { o } : \mu _ { 1 } - \mu _ { 2 } = 0 \text { versus } H _ { a } : \mu _ { 1 } - \mu _ { 2 } \neq 0 \text {, }$ the computed value of the test statistic is z = 2.25. The P-value for this two-tailed test is then __________.