HP 300s+ Scientific manual Sum Sub-menu  STAT  Sum, Var Sub-menu   Stat  Var

		n • ∑xy – ∑x •				∑y
		-------------------------------------------------
B =			n∑x2		– (∑x)	2
r	=				n • ∑xy – ∑x • ∑y
		----------------------------------------------------------------------------------------------------
		⎧		2	– (∑x)	2 ⎫⎧	∑y	2	+ (–∑y)	2	⎫
		⎨n∑x				⎬⎨n •					⎬
		⎩				⎭⎩					⎭
ˆ	=	y – A			ˆ
x		-----B------			y = A + Bx

Sum Sub-menu ( (STAT)  (Sum))

Select this menu item: When you want to obtain this:

 ∑x2	Sum of squares of the X-data
 ∑x	Sum of the X-data
 ∑y2	Sum of the squares of the Y-data
 ∑y	Sum of the Y-data
 ∑xy	Sum of products of the X-data and Y-data
 ∑x3	Sum of cubes of the X-data
 ∑x2 y	Sum of (X-data squares X Y-data)
 ∑x4	Sum of biquadrate of the X-data

Var Sub-menu (  (STAT)  (Var))
Select this menu item:	When you want to obtain this:
n	Number of samples
 x	Mean of the X-data
 xσn	Population standard deviation of the X-data
 xσn – 1	Sample standard deviation of the X-data
 y	Mean of the Y-data
 yσn	Population standard deviation of the Y-data
 yσn – 1	Sample standard deviation of the Y-data

52