题型：问答题 简答题 阅读理解。 The four sweaters on the bed are red, yellow, black and blue. They're Amy's, Bill's, Charles' and Mary's. I know Amy likes red. But the red sweater isn't Amy's. What color is Charles' sweater? I don't know. But I know his sweater isn't red. Bill and Amy say," Our sweaters aren't black." Mary says, "My sweater is blue." NameMaryAmyBillCharlesColor1234 查看答案
题型：问答题 简答题 计算简单相关的相关系数的要求是（）A.因变量是正态变量，自变量可以不满足正态B.自变量是正态变量，因变量可以不满足正态C.两变量都要求满足正态分布D.两变量只要求是数值变量指标E.两变量只要求是分类变量指标 查看答案
