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Standard Error of b:S.E(b)=Sb=SYXΣ(X−X¯)2−−−−−−−−−√−−−−(1)Where,SYX=ΣY2−aΣY−bΣXYn−2−−−−−−−−−−−−−−−−−√Putting values,SYX=7230−(19.97)(250)−(−0.157)(9415)10−2−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−√SYX=3715.668−−−−−−−√SYX=21.55Now putting values in Eq(1),S.E(b)=Sb=21.552160−−−−√=0.464
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