HP 33s ƒ(xi − x )2 ⎟ (n − 1), ƒ(yi − y )2 ⎟ (n − 1), G–16, G–16 Operation Index

Name	Keys and Description	Page	¼
p	gInserts a blank space	13–14	2
	character during equation entry.
SQ	!Square of argument.	6–15	2
SQRT	#Square root of x.	6–15	2
STO variable	Ivariable	3–2
	Store. Copies x into variable.
STO + variable	I›variable	3–4
	Stores variable + x into variable.
STO – variable	I variable	3–4
	Stores variable – x into variable.
STO ⋅ variable	Izvariable	3–4
	Stores variable ⋅ x into variable.
STO ⎟ variable	Iqvariable	3–4
	Stores variable ⎟ x into variable.
STOP	gRun/stop.	12–17
	Begins program execution at the
	current program line; stops a
	running program and displays the
	X–register.
	Displays the summation menu.	11–4
sx	{Uº}	11–6	1
	Returns sample standard deviation
	of x–values:
	ƒ(xi − x )2 ⎟ (n − 1)
sy	{U¸}	11–6	1
	Returns sample standard deviation
	of y–values:
	ƒ(yi − y )2 ⎟ (n − 1)

G–16Operation Index