Casio fx-3650P, fx-3950P 5Inverse Regression, 6Quadratic Regression, A, B, r, Sxy, Sxx, Sxy, Sxx, )y –, = Σx, = Σx, = Σx, (Σy)2, (Σx)2, (Σx2)2, Sxx.Syy, (Σx–1)2, Σx–1.Σy, (Σx.Σy)

5Inverse Regression								y = A + B ￿ 1/x
u Regression coefficient A									u Regression coefficient B
A =	Σy – B.Σx–1								B =	Sxy
		n								Sxx
u Correlation coefficient r
r =		Sxy
		Sxx.Syy
Sxx = Σ(x–1)2–					(Σx–1)2		,	Syy = Σy2–			(Σy)2
						n					n
Sxy = Σ(x			–1	)y –	Σx–1.Σy
						n
6Quadratic Regression									y = A + Bx + Cx2

u Regression coefficient A

A= Σny – B(Σnx ) – C(Σnx2 )

u Regression coefficient B

B= (Sxy.Sx2x2 – Sx2y.Sxx2) ⎟ {Sxx.Sx2x2 – (Sxx2)2}u Regression coefficient CC= Sx2y.Sxx – Sxy.Sxx2

2

(Σx)2

(Σx.Σy)

Sxx = Σx

–

, Sxy = Σxy

–

n

n

2

3

(Σx.Σx2)

2 2

4

(Σx2)2

Sxx

= Σx

–

,

Sx x

= Σx

–

n

n

2

2

(Σx2.Σy)

Sx

y

= Σx

y

–

n

E-33