根据网考网和考试题库的统计分析，以下试题在2014-12-26日PMP选择题习题练习中，答错率较高，为：62%
【单选题】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. 0.143
b. 0.0312
c. 0.0273
d. 0.0156
e. 0.0078
网考网参考答案：D，答错率：62%
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