for what value of c is the quantity sigma(Xi-c)^2 minimized? [Hint: Take the derivative with respect to c , set equal to 0 and solve] I don't know where to start...
Last edited by mr fantastic; Mar 11th 2010 at 05:57 PM. Reason: Changed post title
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Originally Posted by questionboy for what value of c is the quantity sigma(Xi-c)^2 minimized? [Hint: Take the derivative with respect to c , set equal to 0 and solve] I don't know where to start... Start by noting that and then use the hint.
Thank you Mr fantastic Do I set derivative of C equal to zero?
Last edited by mr fantastic; Mar 12th 2010 at 01:30 AM. Reason: restored original post so the reply from matheagle makes sense.
why don't you use the hint......... Take the derivative with respect to c , set equal to 0 and solve set this equal to zero, shows that And it is a min, that's why you should obtain the second derivative.
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