选择题：In order to test for the significance of a regression model

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题目类型：选择题
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题目内容：

In order to test for the significance of a regression model involving 14 independent variables and 255 observations, the numerator and denominator degrees of freedom（respectively）for the critical value of F are

A.14 and 255

B.255 and 14

C.14 and 240

D.13 and 240

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