Metodą najmniejszych kwadratów do punktów pomiarowych dopasowano prostą:
Rt=R0 1+γt=γR0t+R0
x=(6+8+10+12+14+16+18+20+22+24+26+28+30+32+34+36+38+40+42+44+46+48+50+52+54+56+58+60+62+64+66+68+70+72+74+76+78+80+82+84+86+88+90+92+94+96)46=51[°C]
y=(100,7+101,32+101,79+102,33+102,99+103,49+104,05+104,7+105,17+105,95+106,49+106,98+107,64+108,2+108,9+109,4+110,18+110,8+111,4+112,15+112,95+113,66+114,3+114,95+115,67+116,3+116,99+117,75+118,43+119,16+119,96+120,62+121,34+122,15+122,7+123,76+124,15+124,98+125,78+126,54+127,2+127,9+128,58+129,4+130,1+131,82)46
y=115,039[Ω]
D=i=1n(xi-x)2
D=6-512+8-512+10-512+12-512+14-512+16-512+18-512+20-512+22-512+24-512+26-512+28-512+30-512+32-512+34-512+36-512+38-512+40-512+42-512+44-512+46-512+48-512+50-512+(52-51)2+54-512+56-512+58-512+60-512+62-512+64-512+66-512+68-512+70-512+72-512+74-512+76-512+78-512+80-512+82-512+84-512+86-512+88-512+90-512+92-512+94-512+(96-51)2
D=32430°C2
a=1Di=1nyi(xi-x)
i=1nyixi-x==100,7∙6-51+101,32∙8-51+101,79∙10-51+102,33∙12-51+102,99∙14-51+103,49∙16-51+104,05∙18-51+104,07∙20-51+105,17∙22-51+105,95∙24-51+106,49∙26-51+106,98∙28-51+107,64∙30-51+108,2∙32-51+108,9∙34-51+109,4∙36-51+110,18∙38-51+110,8∙40-51+111,4∙42-51+112,15∙44-51+112,95∙46-51+113,66∙48-51+114,3∙50-51+114,95∙(52-51)+115,67∙54-51+116,3∙56-51+116,99∙58-51+117,75∙60-51+118,43∙62-51+119,16∙64-51+119,96∙66-51+120,62∙68-51+121,34∙70-51+122,15∙72-51+122,7∙74-51+123,76∙76-51+124,15∙78-51+124,98∙80-51+125,78∙82-51+126,54∙84-51+127,2∙86-51+127,9∙88-51+128,58∙90-51+129,4∙92-51+130,1∙94-51+131,82∙96-51=11027,21Ω∙°C
a=1Di=1nyi(xi-x)=132430[°C2]∙11027,21 Ω∙°C=0,34Ω°C=γ∙R0
b=y-ax=115,039Ω-0,34Ω°C*51°C]=97,7Ω=R0
sy=i=1nyi-axi+b2n-2
i=1nyi-axi+b2==(100,7-0,34∙6-97,7)2+(101,32-0,34∙8-97,7)2+(101,79-0,34∙10-97,7)2+(102,33-0,34∙12-97,7)2+(102,99-0,34∙14-97,7)2+(103,49-0,34∙16-97,7)2+(104,05-0,34∙18-97,7)2+(104,07-0,34∙20-97,7)2+(105,17-0,34∙22-97,7)2+(105,95-0,34∙24-97,7)2+(106,49-0,34∙26-97,7)2+(106,98-0,34∙28-97,7)2+(107,64-0,34∙30-97,7)2+(108,2-0,34∙32-97,7)2+(108,9-0,34∙34-97,7)2+(109,4-0,34∙36-97,7)2+(110,18-0,34∙38-97,7)2+(110,8-0,34∙40-97,7)2+(111,4-0,34∙42-97,7)2+(112,15-0,34∙44-97,7)2+(112,95-0,34∙46-97,7)2+(113,66-0,34∙48-97,7)2+(114,3-0,34∙50-97,7)2+(114,95-0,34∙52-97,7)2+(115,67-0,34∙54-97,7)2+(116,3-0,34∙56-97,7)2+(116,99-0,34∙58-97,7)2+(117,75-0,34∙60-97,7)2+(118,43-0,34∙62-97,7)2+(119,16-0,34∙64-97,7)2+(119,96-0,34∙66-97,7)2+(120,62-0,34∙68-97,7)2+(121,34-0,34∙70-97,7)2+(122,15-0,34∙72-97,7)2+(122,7-0,34∙74-97,7)2+(123,76-0,34∙76-97,7)2+(124,15-0,34∙78-97,7)2+(124,98-0,34∙80-97,7)2+(125,78-0,34∙82-97,7)2+(126,54-0,34∙84-97,7)2+(127,2-0,34∙86-97,7)2+(127,9-0,34∙88-97,7)2+(128,58-0,34∙90-97,7)2+(129,4-0,34∙92-97,7)2+(130,1-0,34∙94-97,7)2+(131,82-0,34∙96-97,7)2=9,645979Ω2
sy=9,645979Ω246-2=0,468217Ω
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