HP 10bII+ User Manual page 26

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
Σ
statistics to find
Table 1-31 Statistics example
Keys
\t
GÆV:¡
YÆd:¡
SÆJS:¡
v¡
\k
\«
\h
\«
\T\«
\W\«
]f
For more information on statistical calculations, refer to chapter 12, Statistical Calculations.
18 At a Glance...
xy.
2
x-data
50
y-data
4 6
90 160
Display Description
0.00 Clears statistics registers.
1.00 Enters first x,y pair.
2.00 Enters second x,y pair.
3.00 Enters third x,y pair.
1 2.00 Reviews entered statistical
data, starting with the initial
x-value. Press
through and verify the
entered statistical data.
Press
4.00 Displays mean of x.
100.00 Displays mean of y.
2.00 Displays sample standard
deviation of x.
55.68 Displays sample standard
deviation of y.
- 1 0.00 Displays y-intercept of
regression line.
27.50 Displays slope of regression
line.
1,420.00
Displays
products of x- and y-values.
1
to scroll
M
to exit.
Σ
xy, sum of the