A seals a brake pipe. A: dummy coupling B: coupled hose
A seals a brake pipe. A: dummy coupling B: coupled hose
虚拟变量陷阱(dummy variable trap)是以下哪个情形
虚拟变量陷阱(dummy variable trap)是以下哪个情形
if there are m categories ，how many dummy variables should be put into the model? A: m B: m+1 C: m-1 D: m-k
if there are m categories ，how many dummy variables should be put into the model? A: m B: m+1 C: m-1 D: m-k
哑变量(Dummy Variables )又称虚拟变量,用以反映质的属性的一个人工变量。
哑变量(Dummy Variables )又称虚拟变量,用以反映质的属性的一个人工变量。
Which of the following is NOT part of the vacuum brake system? A: Coupled hose. B: Dummy coupling. C: Brake pipe. D: Manual brake.
Which of the following is NOT part of the vacuum brake system? A: Coupled hose. B: Dummy coupling. C: Brake pipe. D: Manual brake.
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