kPerforming Paired-variable Statistical Calculations

To perform the example operations in this section, first select REG (N5) as the calculation mode.

A Regression Calculation Types

The REG Mode lets you perform the seven types of regression listed below. The figures in the parentheses show the theoretical formulas.

• Linear

(y = a + bx)

• Quadratic

(y = a+ bx + cx2)

• Logarithmic

(y = a + b lnx)

• e Exponential

(y = aebx)

• ab Exponential

(y = abx)

• Power

(y = axb)

• Inverse

(y = a + b/x)

Each time you enter the REG Mode, you must select the type of regression calculation you plan to perform.

Selecting the Regression Calculation Type

1.Press N5(REG) to enter the REG Mode.

•This displays the initial regression calculation selection menu. The menu has two screens, and you can use d and e to navigate between them.

L i n Log E x p Pwr

1 2 3 4

I n v Quad AB–E x p

1 2 3

2. Perform one of the following operations to select the regression calculation you want.

To select this regression type:And press this key:

 

 

Linear

1(Lin)

 

 

Logarithmic

2(Log)

e Exponential

3(Exp)

 

 

Power

4(Pwr)

 

 

Inverse

e1(Inv)

Quadratic

e2(Quad)

 

 

ab Exponential

e3(AB-Exp)

 

 

Note

You can switch to another regression calculation type from within the REG Mode, if you want. Pressing 12(S-VAR)3(TYPE) will display a menu screen like the one shown in step 1 above. Perform the same operation as the above procedure to select the regression calculation type you want.

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