Suppose We Wish to Test $H _ { 0 } : \mu = 40 \mathrm { vs } . H _ { \mathrm { a } } : \mu > 40$

Multiple Choice

Suppose we wish to test $H _ { 0 } : \mu = 40 \mathrm { vs } . H _ { \mathrm { a } } : \mu > 40$ . What will result if we conclude that the mean is greater than 40 when its true value is really 47 ?

A) a Type I error
B) a correct decision
C) a Type II error
D) none of the above