A.Belk和Sunderman B.Levey和Jennings C.J.OWestgard D.T.P.Whitehead E.W.A·Shewhart
A.Shewhar B.Levey和Jennings C.J.OWestgard D.Henry E.Segalove
A.-0.5 B.+0.5 C.0 D.+1 E.-1