Show that (Sorry about the lack of latex here) [Σ from i=1 to n] of (x[i] - x(bar))^2 = [Σ from i=1 to n] of (x^2[i] - n*x^2(bar)
Last edited by mitch_nufc; Mar 5th 2009 at 09:48 AM.
Follow Math Help Forum on Facebook and Google+
Hello, mitch_nufc! We need to know the definition of the mean: . Show that . We have: . . . . . . . . . . .[1] The last sum is: . Then [1] becomes: . . . . There!
View Tag Cloud