24
Example:
To calculate correlation coefficient (r) and x value when
y = data set of 10: (20,20), (30,26), (40,30)
X1=
Operation
Display (Lower)
Display (Upper)
X4=
2nd
(2-VAR)
x'(
∑
xy a b r
0.993399268
n x Sx
σ
x y
3.
x' y'
2nd
x'(10 –0.666666667
Example:
To calculate n, x , σx and variance of a population (σx
2
)
of data: 75, 85, 90, 77, 77 in one-variable mode.
X1=
Operation
Display (Lower)
Display (Upper)
X5=
2nd
2nd
(CLRDATA)
σ
x
σ
x
2
32.96
n x Sx
σ
x
5.
n x Sx
σ
x
80.8
n x Sx
σ
x
5.741080038
(1-VAR)