题型:选择题 ______ the danger ahead on the railway line, he decided to go to Beijing by plane instead.A.Having been informed of B.Having informed ofC.To be informed ofD.Informing of 查看答案
题型:单项选择题 假设检验中,若P<0.05,下列结论正确的是()A.接受无效假设,拒绝备择假设B.差异无显著性C.备择假设的被接受的概率小于0.05D.观察值太少E.无效假设成立的可能性很小,属小概率事件 查看答案