Fnd the critical z values. Assume that the normal distrbution appplies. two-taled test; a=0.07 z=? round to two decimalal places as needed, Use a comma to separate answers as needed. Solution First calculate Zo = (calculated mean - given mean )/(S.D./n ) Then find Z/2 Reject Ho if Zo > Z/2 Z 0.07/2 =1.81191.