题目内容

某地区2002年参加医疗保险的人数是1998年的4倍，比2001年增长60%，那么，2001年参加医疗保险的人数比1998年增长()。

A. 2.5
B. 2.4
C. 1.5
D. 0.4

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在大样本条件下，已求得一元线性回归方程，并给定自变量数值X0，做出点估计值$0y。若再结合用2倍值乘以估计标准误Sy，作区间预测，这时预测结果的概率保证程度是()。

A. 0.6827
B. 0.95
C. 0.9545
D. 0.9973

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The credit card serves as a medium of exchange in the wide range of transactions.

A. Right.
B. Wrong.
C. Doesn't say.

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We can learn from the second part of the passage that there are some equations of market which can explain the demand and supply of the currency of a country.

A. Right.
B. Wrong.
C. Doesn't say.

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Which of the following statements is False according to the text？

A. Competition is gradually forcing banks to question their identity.
B. Most of the different activities done by banks could be done by other types of institution.
C. Regulations in America and Japan are preventing commercial banks from getting into the securities business.
D. Separating the commercial and investment banking activities of some American banks would be very difficult.

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某地区2002年参加医疗保险的人数是1998年的4倍，比2001年增长60%，那么，2001年参加医疗保险的人数比1998年增长()。

A. 2.5 B. 2.4 C. 1.5 D. 0.4

在大样本条件下，已求得一元线性回归方程，并给定自变量数值X0，做出点估计值$0y。若再结合用2倍值乘以估计标准误Sy，作区间预测，这时预测结果的概率保证程度是()。

The credit card serves as a medium of exchange in the wide range of transactions.

We can learn from the second part of the passage that there are some equations of market which can explain the demand and supply of the currency of a country.

Which of the following statements is False according to the text？

A. 2.5
B. 2.4
C. 1.5
D. 0.4