CONSTRAINED FIT INFORMATIONshow precise values?

 
An overall fit to 2 branching ratios uses 6 measurements and one constraint to determine 3 parameters. The overall fit has a $\chi {}^{2}$ = 4.6 for 4 degrees of freedom.
 
The following off-diagonal array elements are the correlation coefficients <$\mathit \delta $x$_{i}$~$\delta $x$_{j}$> $/$ ($\mathit \delta $x$_{i}\cdot{}\delta $x$_{j}$), in percent, from the fit to parameters ${{\mathit p}_{{i}}}$, including the branching fractions, $\mathit x_{i}$ =$\Gamma _{i}$ $/$ $\Gamma _{total}$. The fit constrains the ${{\mathit x}_{{i}}}$ whose labels appear in this array to sum to one.
 
 x1  100
 x2   100
 x4    100
   x1  x2  x4
 
  Mode Fraction (Γi / Γ)Scale factor

Γ1  ${{\mathit \pi}^{0}}$ $\rightarrow$ 2 ${{\mathit \gamma}}$  $0.98823$ $\pm0.00034$ 1.5
Γ2  ${{\mathit \pi}^{0}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$  $0.01174$ $\pm0.00035$ 1.5
Γ4  ${{\mathit \pi}^{0}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit e}^{-}}$  ($3.34$ $\pm0.16$) $ \times 10^{-5}$