I am creating a report for my physics class and all I have left to do is calculate the standard uncertainty for this formula.
$$ \ln \left( \frac{R_{T}}{R_{\infty}} \right) = \ln \left( R_{T} \right) - \ln \left( R_{\infty} \right)$$
From linear regresion iregression I know that 
= b$\ln \left( R_{\infty} \right) = b$ in one of NTC termistors in case of heating it is u(b) = 0,165193075$u \left( b \right) = 0.165193075$ ( its aits an uncertainty of this val) its caluletedcalculated with REGLIMP fun in exelexcel.
But my uncernityuncertainty for one of NTC termistors in case of heating in R1$R_{1}$ is equal 0,534to $0.534$ so ln(R1)$\ln \left( R_{1} \right)$ for it is negative.
If someone can help iI would very appricateappreciate that.
$$ R_{T} = R_{\infty} e^{\frac{W_{g}}{2 k T}} $$
And its a forumalaformula for calculating energy break.
- k$k$ - is a Boltzmanna const in eV$eV$
- R∞$R_{\infty}$ - resistance at temperature going to infinity
- T$T$ - temperature (expressed in Kelvin )
- Wg$W_{g}$ - energy gap value
