Appendix 1—table 9. Linear regression results with NSP4 as independent variable.

For more information about the variables involved (columns) consult Appendix 1—table 6 or Appendix 1 Section – Linear Regression Model.

Model	Slope (β)	Std.error${\displaystyle \left({\sigma }_{\hat{\beta }}^2\right)}$	t-value	p-value	RSE	R-squared
${\displaystyle VP6={\beta }_{VP6}\times NSP4}$	1.103683	0.0212345	51.97592	5.626321×10−51	0.079	0.978