假设x、Y两个变量分别表示不同类型借款人的违约损失,其相关系数为0.3,若同时对X、Y作相同的线性变化x1=2X.Y1=2Y,则x1和Y1的相关系数为()。
A. 0.3
B. 0.6
C. 0.09
D. 0.15
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The major difference between modern private and public libraries lies in
A. readership.
B. content.
C. service.
D. function.
The earliest public library was also called a subscription library because books
A. could be lent to everyone.
B. could be lent by book stores.
C. were lent to students and the faculty.
D. were lent on a membership basis.
假定某企业2006年的销售成本为50万元。销售收入为100万元,年初资产总额为:70万元,年底资产总额为190万元。则其总资产周转率约为()。
A. 20%
B. 26%
C. 53%
D. 56%
根据Credit Risk+模型,假设某贷款组合由100笔贷款组成,该组合的平均违约率为2%,E=72,则该组合发生4笔贷款违约的概率为()。
A. 0.09
B. 0.08
C. O.07
D. 0.06