超星 - 随堂测试5-3

单选题

A binary variable is often called a

A. dummy variable.
B. dependent variable.
C. residual.
D. power of a test.

单选题

Which of the following is true of dummy variables?

A dummy variable always takes a value less than 1.
B. A dummy variable always takes a value higher than 1.
C. A dummy variable takes a value of 0 or 1.
D. A dummy variable takes a value of 1 or 10.

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单选题

Which of the following is true of dependent variables?

A dependent variable can only have a numerical value.
B. A dependent variable cannot have more than 2 values.
C. A dependent variable can be binary.
D. A dependent variable cannot have a qualitative meaning.

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判断题

The dummy variable coefficient for a particular group represents the estimated difference in intercepts between that group and the base group.

A. 对
B. 错

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判断题

A problem that often arises in policy and program evaluation is that individuals (or firms or cities) choose whether or not to participate in certain behaviors or programs.

A. 对
B. 错

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