A Test Of $H _ { 0 } : \mu = 57$

Multiple Choice

A test of $H _ { 0 } : \mu = 57$ versus $H _ { 1 } : \mu \neq 57$ is performed using a significance level of $\alpha = 0.01$ . The value of the test statistic is $z = - 2.43$ .
If the true value of $\mu$ is 55 , does the conclusion result in a Type I error, a Type II error, or correct decision?

A) Type II error
B) Type I error
C) Correct decision