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问题 单项选择题

5年的年报酬率如表所示，由表可得A股票基金与股价指数的α值与β值分别为 ( )。


年报酬率分布表

年份12345
A股票基金8%10-16%-5%12%
股价指数12%15%-25%-7%20%

A．-0.1185；0.6395
B．0.9395；0.6395
C．0.1185；0.6395
D．-0.1185；0.9595

答案

参考答案：A

解析： 运用财务计算器：输入财务计算器的回归功能，以A股票基金为Y值，股价指数为X值：
Y01=8，Y02=10，Y03=-16，Y04=-5，Y05=12；
X01=12，X02=15，X03=-25，X04=-7，X05=20；
可得回归式：Y=-0.1185+0.6395X，进而得出A股票基金与股价指数的α值为- 0.1185，β值为0.6395。

完形填空

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Schools and parents should cut down some of the homework    63   our children can enjoy more than nine   64  sleep every night for their health．For children, we should make best use of our time. When we have enough time for sleeping，we will find   65  much better for both our study and health. 

(    )小题1:A．that        B．this         C．It
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单项选择题

铸胶滚筒铸胶磨损厚度不大于（）。

A．40%

B．50%

C．60%

D．80%
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