BQ40Z50-R2: The accuracy of pull-up resistor for NTC in BQ40z50

Hi Sir,

I used the BQ40z50-R2 in our battery pack.

From the page 13 of BQ40z50-R2 datasheet , the internal pullup resistance (Rntc(pu)) min value is 14.4Kohm, type value is 18Kohm, Max Value is 21.6Kohm.

But for the NTC Coefficient a1~a5, b1~b4,  in the calculation table, the R_TH type value is 18Kohm , but the Resistor tolerance is ±1%，there is no reference to the datasheet for 20% accuracy.

I want to know, what is the accuracy of the R_TNC(PU) resistor？

Thanks ,

Billy