$$
Y_j = \frac {1} {loops} \sum_{i = 1}^{loops} {X_{i, j}} \quad (j = 1, 2, ..., repeat)
$$
$$
\begin{aligned}
VAR(Y) &= VAR(\frac {1} {loops} \sum_{i = 1}^{loops} {X_i}) \\
&= \frac {1} {{loops}^2} \sum_{i = 1}^{loops} {VAR(X_i)} \\
&= \frac {1} {loops} {\sigma}^2
\end{aligned}
$$
$$
\sigma = \sqrt {VAR(Y)} * \sqrt{loops}
$$
Is there a missing multiplication by $\sqrt{loops}$ in the source code?
