- #1
jenny_shoars
- 21
- 0
I'm doing my first paper review and an equation is holding me up. I can't tell if I'm just missing something silly or if the author made a mistake.
Given that:
[tex]\sum_{n=1}^{N}s_{n} = 1[/tex]
The author says that:
[tex]\sum_{n=1}^{N}(s_{n} - \frac{1}{N})^{2} = \sum_{n=1}^{N}s_{n}^{2} - \frac{1}{N}[/tex]
I seem to be having some trouble getting this to work. Am I just missing something? Or is this the author's mistake? Thanks!
Given that:
[tex]\sum_{n=1}^{N}s_{n} = 1[/tex]
The author says that:
[tex]\sum_{n=1}^{N}(s_{n} - \frac{1}{N})^{2} = \sum_{n=1}^{N}s_{n}^{2} - \frac{1}{N}[/tex]
I seem to be having some trouble getting this to work. Am I just missing something? Or is this the author's mistake? Thanks!