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Old 04-29-2013, 01:05 AM
Ziad Hatahet Ziad Hatahet is offline
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Join Date: Apr 2013
Location: San Francisco, CA
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Default Re: Question 4 linear regression hypothesis

Quote:
Originally Posted by gmacaree View Post
Am having exactly the same issue -- I was using a lazy point-fitting technique and came up with an answer matching one of the choices, but then as soon as I used a more rigourous solution for through-the-origin regression I end up with a slope of 1.42. That's obviously incorrect but I'm slightly baffled as to why I get it right when I do it wrong and wrong when I do it right!
Same here. I used the linear regression-through-the-origin formula and came up with a slope of ~1.42. The first time I just used the slope from the line that passes through both points, and got 0.79.

What makes you say that 1.42 is obviously incorrect though?
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