Casio fx-82ES PLUS User Manual page 43

Commands when Quadratic Regression Calculation (_+CX
Selected
Reg Sub-menu (
Select this menu
item:
(A)
(B)
(C)
(x ˆ )
1
(x ˆ )
2
(y ˆ )
Note
• x ˆ , x ˆ , x ˆ and y ˆ are not variables. They are commands of the type that take an
1 2
argument immediately before them. See "Calculating Estimated Values" for more
information.
Example 2: To input the single-variable data x = {1, 2, 2, 3, 3, 3, 4, 4,
5}, using the FREQ column to specify the number of repeats for each
items ({x ; freq } = {1;1, 2;2, 3;3, 4;2, 5;1}), and calculate the mean and
n n
population standard deviation.
fx-82ES PLUS/fx-85ES PLUS/fx-350ES PLUS:
(SETUP)
fx-95ES PLUS:
1
(STAT) (Reg))
When you want to obtain this:
Regression coefficient constant term A
Linear coefficient B of the regression
coefficients
Quadratic coefficient C of the regression
coefficients
Estimated value of x
Estimated value of x
Estimated value of y
(STAT)
(SETUP) (STAT)
(STAT) (1-VAR)
2 3 4 5
1 2 3
(STAT) (Var)
(STAT) (Var) (σ
42
2
1
2
(ON)
(ON)
2
(x)
)
1.154700538
x
) Is
3