HP 10bII+ Financial \T\«, \W\«, GÆV:¡, YÆd:¡, SÆJS:¡

Using the following data, find the means of x and y, the sample standard deviations of x and y, and the y-intercept and the slope of the linear regression forecast line. Then, use summation

statistics to find Σ xy.

	x-data	2	4	6
	y-data	50	90	160
Table 1-31 Statistics example
Keys			Display	Description
\t			0.00	Clears statistics registers.
GÆV:¡			1.00	Enters first x,y pair.
YÆd:¡			2.00	Enters second x,y pair.
SÆJS:¡			3.00	Enters third x,y pair.
v¡			1 2.00	Reviews entered statistical
				data, starting with the initial
				x-value. Press 1to scroll
				through and verify the
				entered statistical data.
				Press Mto exit.
\k			4.00	Displays mean of x.
\«			100.00	Displays mean of y.
\h			2.00	Displays sample standard
				deviation of x.
\«			55.68	Displays sample standard
				deviation of y.
\T\«			-10.00	Displays y-intercept of
				regression line.
\W\«			27.50	Displays slope of regression

		line.
]f	1,420.00	Displays Σ xy, sum of the
		products of x- and y-values.

For more information on statistical calculations, refer to chapter 12, Statistical Calculations.

18 At a Glance...