HP 33S - Page 366

G–16 Operation Index
File name 33s-E-Manual-1008-Publication(1st).doc Page : 386
Printed Date : 2003/10/8 Size : 13.7 x 21.2 cm
Name Keys and Description Page 
SQ
=
Square of argument. 6–15 2
SQRT
?
Square root of x. 6–15 2
STO variable
e
variable
Store. Copies x into variable.
3–2
STO + variable
e Ù
variable
Stores variable + x into variable.
3–4
STO – variable
e Ã
variable
Stores variable – x into variable.
3–4
STO
×
variable
e ¸
variable
Stores variable
×
x into variable.
3–4
STO
÷
variable
e ¯
variable
Stores variable
÷
x into variable.
3–4
STOP
¥
Run/stop.
Begins program execution at the
current program line; stops a
running program and displays the
X–register.
12–17
º .
Displays the summation menu. 11–4
sx
º +
{

}
Returns sample standard deviation
of x–values:
)1()(
2
−÷−
∑
nxx
i
11–6 1
sy
º +
{

}
Returns sample standard deviation
of y–values:
)1()(
2
−÷−
∑
nyy
i
11–6 1
TAN
q
Tangent. Returns tan x. 4–3 1