题目内容

If a new independent variable is added to a regression equation, the adjusted R2 increases only if the absolute value of the t statistic of the new variable is greater than one.

A. 对
B. 错

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F statistic can be used to test nonnested models.

A. 对
B. 错

Predictions of a dependent variable are subject to sampling variation.

A. 对
B. 错

To make predictions of logarithmic dependent variables, they first have to be converted to their level forms.

A. 对
B. 错

硅二极管PN结的压降约为：

A. 0.7V
B. 0.3V
C. 0.5V
D. 0.8V