It's the first month of school, and Billy, a seventh grader, has found himself in the principal's office already. One of his classmates tattled on him for repeatedly hitting a girl on top of the head with his math book. He is going to get that boy after this, he thought to himself. The principal walks into the office. He has learned about Six Sigma for public health and schools. He has decided to try the "Five Why's" method for finding the root of the problem with Billy. The principal starts his questioning. "Billy, why did you hit the girl over the head with your math book?" Billy laughed and said, "Because it was funny." The principal is at his second why. "Billy, why did you think it was funny?" Billy shrugged his shoulders. "I don't know. Probably because she screamed." The principal was getting hopeful this method might work. "Billy, why did she scream?" Billy looked puzzled. "She screa
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