Paired-variable Menu Item

Select this

menu item: When you want to do this:

Display the Reg sub-menu of commands for regression calculations

• For details see “Commands when Linear Regression Calculation (A+BX) Is

7Reg Selected” on page E-117 and “Com- mands when Quadratic Regression Calculation (_+CX2) Is Selected” on page E-121.

ASingle-variable (1-VAR) Statistical Calculation Commands

The following are the commands that appear on the sub- menus that appear when you select 4(Sum), 5(Var) or 6(MinMax) on the STAT menu while a single-variable statistical calculation type is selected.

Calculation formula used for each command

o = Σnx

xσn =

 

Σ (x o)2

 

 

n

 

 

 

 

 

 

 

xσn –1 =

 

Σ (x o)2

 

n – 1

 

 

 

Sum Sub-menu (17(S-MENU)4(Sum))

Select this

When you want to obtain this:

menu item:

 

1Σx2

Sum of squares of the sample data

2Σx

Sum of the sample data

Var Sub-menu (17(S-MENU)5(Var))

Select this

When you want to obtain this:

menu item:

 

1n

Number of samples

2o

Mean of the sample data

3xσn

Population standard deviation

4xσn–1

Sample standard deviation

 

E-113