Name

Keys and Description

Page

 

 

 

 

 

 

 

 

 

ˆ

(

ˆ

)

 

 

12–11

1

x

 

 

 

 

 

 

 

Given a y–value in the X–register,

 

 

 

returns the xestimatebased on the

 

 

 

regression line: xˆ = (y – b) m.

 

 

!

*Factorial (or gamma).

4–15

1

 

Returns (x)(x – 1) ... (2)(1), or Γ (x +

 

 

 

1).

 

 

 

 

 

 

XROOT

The argument1 root of

6–16

1

 

argument2.

 

 

 

 

 

 

x w

ÕÕ(

 

w )Returns

12–4

1

 

weighted mean of x values: (Σyixi)

 

 

 

Σyi.

 

 

 

 

 

 



Displays the mean (arithmetic

12–4

 

 

average) menu.

 

 

x<> variable

x exchange.

3–8

 

 

Exchanges x with a variable.

 

 

x<>y

x exchange y.

2–4

 

 

Moves x to the Y–register and y to

 

 

 

the X–register.

 

 

 

 

 



Displays the "x?y" comparison tests

14–7

 

 

menu.

 

 

 

 

 

 

xy

()

14–7

 

 

If xy, executes next program line;

 

 

 

if x=y, skips next program line.

 

 

xy?

Õ()

14–7

 

 

If xy, executes next program line;

 

 

 

if x>y, skips next program line.

 

 

x<y?

ÕÕ(<)

14–7

 

 

If x<y, executes next program line;

 

 

 

if xy, skips next program line.

 

 

x>y?

ÕÕÕ(>)

14–7

 

 

If x>y, executes next program line;

 

 

 

if xy, skips next program line.

 

 

xy?

ÕÕÕÕ()

14–7

 

 

If xy, executes next program line;

 

 

 

if x<y, skips next program line.

 

 

 

 

 

 

 

 

 

 

Operation Index G-15