Casio fx 991MS User Guide - Page 33

31

Temperature at 1000 hPa =

4.642857143

1000

A

X

r

r

r

1

=

Coefficient of Determination =

0.965517241

A

X

r

r

3

K

=

Sample Covariance =

35

E

A

U

r

3

,

A

U

3

-

A

X

1

-

A

X

r

1

F

\

E

A

U

3

,

1

F

=

u

Logarithmic, Exponential, Power, and Inverse

Regression

•

Use the same key operations as linear regression to re-

call results for these types of regression.

• The following shows the regression formulas for each

type of regression.

Logarithmic Regression

y

²

A

³

B

±

In

x

Exponential Regression

y

²

A

±

e

B

·

x

(In

y

²

In A + B

x

)

Power Regression

y

²

A

±

x

B

(In

y

²

In A + BIn

x

)

Inverse Regression

y

²

A

³

B

±

1

/

x

u

Quadratic Regression

•

The regression formula for quadratic regression is:

y

= A + B

x

+ C

x

2

.

In the REG Mode:

r

3

(Quad)

A

B

1

(Scl)

=

(Stat clear)

29

P

1.6

S

50

P

23.5

S

74

P

38.0

S

103

P

46.4

S

118

P

48.0

S

•

Example:

Perform quadratic regression to de-

termine the regression formula terms

for the data nearby. Next, use the

regression formula to estimate the

values for

n

(estimated value of

y

) for

x

i

= 16 and

m

(estimated value of

x

)

for

y

i

= 20.

x

i

y

i

29

1.6

50

23.5

74

38.0

103

46.4

118

48.0

Casio fx 991MS User Guide - Page 33

Logarithmic, Exponential, Power, and Inverse, Regression, Quadratic Regression

Page 33 highlights