실험계획법품질경영기사 · 2020년09월26일 · 10/100
10.직선회귀에서 데이터가 다음과 같을 때, 단순회귀식으로 맞는 것은?
1
=0.7+1.3x
[IMG]https://img.comcbt.com/cbt/data/bp/bp20200926/bp20200926m10b1-1.gif?1611320407
2
=0.7-1.3x
[IMG]https://img.comcbt.com/cbt/data/bp/bp20200926/bp20200926m10b2-1.gif?1611320407
3
=0.8+1.4x
[IMG]https://img.comcbt.com/cbt/data/bp/bp20200926/bp20200926m10b3-1.gif?1611320407정답
4
=0.8-1.4x
[IMG]https://img.comcbt.com/cbt/data/bp/bp20200926/bp20200926m10b4-1.gif?1611320407
해설
y = a + bx b = Sxy/Sxx = 14/10 = 1.4 a = y(bar) - b*x(bar) = 6.4 - 1.4 * 4 = 0.8 y = 0.8 + 1.4x