Statistical Calculations (STAT)

To start a statistical calculation, perform the key operation N2(STAT) to enter the STAT Mode and then use the screen that appears to select the type of calculation you want to perform.

To select this type of statistical calculation:

Press this key:

(Regression formula shown in parentheses)

 

 

Single-variable (X)

1(1-VAR)

 

 

Paired-variable (X, Y), linear regression ( y = A + Bx)

2(A+BX)

 

 

Paired-variable (X, Y), quadratic regression

3( _+CX2)

( y = A + Bx + Cx2)

Paired-variable (X, Y), logarithmic regression

4(ln X)

( y = A + Blnx)

 

 

Paired-variable (X, Y), e exponential regression

5(e^X)

( y = AeBx)

Paired-variable (X, Y), ab exponential regression

6(A•B^X)

( y = ABx)

Paired-variable (X, Y), power regression ( y = AxB)

7(A•X^B)

Paired-variable (X, Y), inverse regression

8(1/X)

( y = A + B/x)

 

 

Pressing any of the above keys (1 to 8) displays the Stat Editor.

Note: When you want to change the calculation type after entering the STAT Mode, perform the key operation 11(STAT)1(Type) to display the calculation type selection screen.

Inputting Data

Use the Stat Editor to input data. Perform the following key operation to display the Stat Editor: 11(STAT)2(Data).

The Stat Editor provides 40 rows for data input when there is an X column only or when there are X and Y columns, 20 rows when there are X and FREQ columns, or 26 rows when there are X, Y, and FREQ columns.

Note: Use the FREQ (frequency) column to input the quantity (frequency) of identical data items. Display of the FREQ column can be turned on (displayed) or off (not displayed) using the Stat Format setting on the setup menu.

1 To select linear regression and input the following data: (170, 66), (173, 68), (179, 75)

STAT

N2(STAT)2(A+BX)

STAT

170 =173 =179 =ce

STAT

66 =68 =75 =

E-22