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Regression calculations
Press
to activate REG mode in order to perform statistical calculations using regression.
2
MODE MODE
Then, select the type of regression:
Press
for Linear regression (Lin)
1
Press
for Logarithmic regression (Log)
2
Press
for Exponential regression (Exp)
3
▶
Press
for Power regression (Pwr)
1
▶
Press
for Inverse regression (Inv)
2
▶
Press
for Quadratic regression (Quad)
3
In this mode,
works as the data key (
M+
•
In order to clear the statistical memory of the calculator, always press
before you start the data input.
Always input data following this pattern: x-data, , , y-data,
•
Press
to calculate the sum of squares of x data (∑x
1
SHIFT
S-SUM
Press
to calculate the sum of x data (∑x)
2
SHIFT
S-SUM
Press
to calculate the number of data (n)
3
SHIFT
S-SUM
▶
Press
1
SHIFT
S-SUM
▶
Press
2
SHIFT
S-SUM
▶
Press
3
SHIFT
S-SUM
Press
to calculate the arithmetic mean of the x data (x)
1
SHIFT
S-VAR
Press
to calculate the population standard deviation of the x data (xσ
2
SHIFT
S-VAR
Press
to calculate the sample standard deviation of the x data (xσ
3
SHIFT
S-VAR
▶
Press
1
SHIFT
S-VAR
▶
Press
2
SHIFT
S-VAR
▶
Press
3
SHIFT
S-VAR
▶ ▶
Press
SHIFT
S-VAR
▶ ▶
Press
SHIFT
S-VAR
For other than quadratic regression:
▶ ▶
Press
SHIFT
S-VAR
▶ ▶ ▶
Press
SHIFT
S-VAR
▶ ▶ ▶
Press
SHIFT
S-VAR
•
Pressing
more than once will input the same data. It is also possible to input multiple
DT
entries of the same data by pressing
input the data "42" and "55" nine times). Note that data input for standard deviation also
applies for regression calculations.
•
Variables A to F, X and Y must not be used for storing data when performing statistical
calculations. Selecting a regression calculation type, or changing from one to another, will
clear these variables.
DE FR EN ES
EN
). Press it every time after input data.
DT
to calculate the sum of squares of y data (∑y
to calculate the sum of y data (∑y)
to calculate the sum of products of x data and y data (∑xy)
to calculate the arithmetic mean of the y data (y)
to calculate the population standard deviation of the y data (yσ
to calculate the sample standard deviation of the y data (yσ
to calculate regression coeffi cient A
1
to calculate regression coeffi cient B
2
to calculate correlation coeffi cient (r)
3
to calculate the estimated value of x (x)
1
to calculate the estimated value of y (y)
2
SHIFT
57
DT
)
2
)
2
(e.g. pressing 42 , 55
;
=
1
CLR
SHIFT
. After data input:
)
n
)
n-1
)
n
)
n-1
;
9
DT
will
SHIFT
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