Casio FX-6300G, Owner'S Manual

Page: 70 / 187

■Regression calculation
•Regression calculations are performed in the LR1 mode
( S B ) -
“ L R 1 ” appears
on the display.
•Before beginning calculations, the tabulation memories are cleared by pressing
girj) followed by dcj) and then (H).
•Individual d ata are entered as
a:
d ata
S C D
y
d ata (
dt
).
•Multiple data of the same value can be entered by repeatedly pressing
(
dt
).
This
operation can also be performed by entering a: data S C ] y data S C O followed
by a value representing the number of times the data is repeated, and then
(
dt
).
•If only x data is repeated (a: data having the same value), enter S C D y data
(
dt
)
or S C D y data S C O followed by a value representing the number of times
the data is repeated, and then
(
dt
).
•If only y data is repeated (y data having the same value), enter x data (dt) or a:
data
S C O
followed by a value representing the total number of times the data
is repeated, and then (dt).
• Regression
The following are the formulas the unit uses to calculate constant term A and regres­
sion coefficient B for the regression formula y - A + Ba:.
C o n s t a n t t e r m o f r e g r e s s i o n R e g r e s s i o n c o e f f i c i e n t o f
f o r m u la r e g r e s s i o n f o r m u l a
^ _ 'E y - B»Ex n » E x y -E x * E y
n n*E x 2- ( E x ) 2
•Estimated value x, and y based on the regression formula can be calculated using
the following formulas:
$ = A + Bx
B
(To obtain the estimated value y, S O is used, and to obtain estimated value
x, S O is used.)
•The correlation coefficient r for input data can be calculated using the following
formula:
r = _______ n * E x y -E x * E y ______ _
J{n-E x2- ( E x ) 2} {n-Ey2- ( E y ) 2}
*The values for n, Ex, Ex2, Exy, Ey, and Ey2 are stored in memories W, V, U,
R, 0 and P respectively, and can be obtained by pressing S followed by the
memory name and then HD (i.e. M f w lB ) .
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