119.The rule of seven used by quality control engineers states that if a run of seven or more samples lays on one side of the process mean,then the process is out of control. What is the probability that this condition is the result of random variations. A.14.30% B.3.12% C.2.73% D.1.56% E.0.78% 答案是D,我觉得应该是E呀,2的7次方分之一,1/128不是等于0.78%么?