equation	error propagation
${\overline{C}}_{ijl}=\frac{{{\displaystyle \sum }}_{k=1}^m{C}_{ijkl}}{m}$	${\text{SE}}_{{\overline{\text{C}}}_{\text{ijl}}}=\sqrt{\frac{{{\displaystyle \sum }}_{\text{k}=1}^{\text{m}}{\left({\text{C}}_{\text{ijkl}}-{\overline{\text{C}}}_{\text{ijl}}\right)}^2}{\text{m}\cdot \left(\text{m}-1\right)}}$
${{\displaystyle \overline{\mathrm{NC}}}}_{\mathrm{ijl}}=\frac{{{\displaystyle \overline{C}}}_{\mathrm{ijl}}}{{{\displaystyle \overline{C}}}_{\mathrm{ijl}\left(\mathrm{RPP}30\right)}}$	${\text{SE}}_{{{\displaystyle \overline{\text{NC}}}}_{\text{ijl}}}={{\displaystyle \overline{\text{NC}}}}_{\text{ijl}}·\sqrt{{\left(\frac{{\text{SE}}_{{{\displaystyle \overline{\text{C}}}}_{\text{ijl}}}}{{{\displaystyle \overline{\text{C}}}}_{\text{ijl}}}\right)}^2+{\left(\frac{{\text{SE}}_{{{\displaystyle \overline{\text{C}}}}_{\text{ijl}\left(\text{RPP}30\right)}}}{{{\displaystyle \overline{\text{C}}}}_{\text{ijl}\left(\text{RPP}30\right)}}\right)}^2}$
$R{E}_{ijl}=\frac{{\overline{NC}}_{ijl}}{{{\displaystyle \sum }}_{\mathrm{j}=1}^{\mathrm{n}}{\overline{NC}}_{ijl}}$	${\text{SE}}_{{\text{RE}}_{\text{ijl}}}={\text{RE}}_{\text{ijl}}\cdot \sqrt{{\left(\frac{{\text{SE}}_{{\overline{\text{NC}}}_{\text{ijl}}}}{{\overline{\text{NC}}}_{\text{ijl}}}\right)}^2+{\left(\frac{\sqrt{{{\displaystyle \sum }}_{\text{j}=1}^{\text{n}}{\left({\text{SE}}_{{\overline{\text{NC}}}_{\text{ijl}}}\right)}^2}}{{{\displaystyle \sum }}_{\text{j}=1}^{\text{n}}{\overline{\text{NC}}}_{\text{ijl}}}\right)}^2}$