Answer
$s_e=271.042$
Work Step by Step
$ŷ =0.676x+2676$
$s_e=\sqrt {\frac{Σ(y_i-ŷ_i)^2}{n-2}}=\sqrt {\frac{[4070-(0.676\times2300+2676)]^2+[5220-(0.676\times3390+2676)]^2+[4640-(0.676\times2430+2676)]^2+[4620-(0.676\times2890+2676)]^2+[4850-(0.676\times3330+2676)]^2+[4120-(0.676\times2480+2676)]^2+[5020-(0.676\times3380+2676)]^2+[4890-(0.676\times2660+2676)]^2+[4190-(0.676\times2620+2676)]^2+[4630-(0.676\times3340+2676)]^2}{10-2}}=271.042$
