# Math Help - What is wrong with this code?

1. ## What is wrong with this code?

$\displaystyle E(S^{2}) = \frac{1}{n-1} \left{\sum E(X_{i}^{2}) - \frac{1}{n} E \left[ \left(\sum X_{i}\right)^{2}\right] \right}$
Its not parsing.

2. never mind: figured it out

$\displaystyle E(S^{2}) = \frac{1}{n-1} \left \{\sum E(X_{i}^{2}) - \frac{1}{n} E \left[ \left(\sum X_{i}\right)^{2}\right] \right \}$

3. Originally Posted by heathrowjohnny
$\displaystyle E(S^{2}) = \frac{1}{n-1} \left{\sum E(X_{i}^{2}) - \frac{1}{n} E \left[ \left(\sum X_{i}\right)^{2}\right] \right}$
Its not parsing.
1. you need $$tags rather than ""s 2. as {} are meta grouping delimiters used by LaTeX if you want to uses them as parentheses you have to preceed them with "\" [tex] \displaystyle E(S^{2}) = \frac{1}{n-1} \left\{\sum E(X_{i}^{2}) - \frac{1}{n} E \left[ \left(\sum X_{i}\right)^{2}\right] \right\}$$

produces:

$\displaystyle E(S^{2}) = \frac{1}{n-1} \left\{\sum E(X_{i}^{2}) - \frac{1}{n} E \left[ \left(\sum X_{i}\right)^{2}\right] \right\}$

3. As far as I am aware the \displaystyle is redundant in the LaTeX implemented here.

RonL

4. Thanks. I was using the $to illustrate the code. 5. Originally Posted by heathrowjohnny Thanks. I was using the$ to illustrate the code.
[noparse][/noparse] tags will display the LaTeX including
tags.

RonL