Casio fx-570ES PLUS, Руководство пользователя

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Results:
Commands when Quadratic Regression Calculation (_+CX
2
) Is
Selected
Reg Sub-menu (
(STAT) (Reg))
Select this menu
item:
When you want to obtain this:
(A) Regression coefficient constant term A
(B)
Linear coefficient B of the regression
coefficients
(C)
Quadratic coefficient C of the regression
coefficients
( x ˆ
1
) Estimated value of x
1
(
x
ˆ
2
) Estimated value of
x
2
( y ˆ) Estimated value of y
Note
• x ˆ, x ˆ
1
, x ˆ
2
and y ˆ are not variables. They are commands of the type that take an
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
n
; freq
n
} = {1;1, 2;2, 3;3, 4;2, 5;1}), and calculate the mean and
population standard deviation.
(SETUP) (STAT) (ON)
(STAT) (1-VAR)
1 2 3 4 5
1 2 3 2
(STAT) (Var) (
x
) 3
(STAT) (Var) (σ
x
) 1.154700538
Mean: 3, Population Standard Deviation: 1.154700538
Example 3: To calculate the linear regression and logarithmic regression
correlation coefficients for the following paired-variable data and determine
the regression formula for the strongest correlation: (
x
,
y
) = (20, 3150),
53