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...

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- March 11th 2010, 05:12 PMquestionboyMaximising a sum of squared differences.
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... - March 11th 2010, 05:54 PMmr fantastic
- March 11th 2010, 07:19 PMquestionboy
Thank you Mr fantastic

Do I set derivative of C equal to zero? - March 11th 2010, 11:16 PMmatheagle
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.