Recent content by liujx80

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    Undergrad One question regarding to the simple regression

    Thanks guys. The parameters are all estimated. I don't have distributions in mind. In general cases, can I use h=b/d using estimates? How wrong it could be? I had the same steps with haruspex's. However I'm not sure we then can say all assumptions are met. As you guys pointed out, it depends on...
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    Undergrad One question regarding to the simple regression

    there are 3 variables. X,Y,Z. Assuming Y = a + b*X + errorTerm Z = c + d*X + errorTerm, Y = g + h*Z + errorTerm; what can we say about the relationtion between h and (b,d)? under what condition so we can have "h = b/d"? thanks