HP 39gs Master Manual page 128

Calculator Tip
If you have trouble seeing the small dots that the calcu ator uses in its
scatter-graphs by defau t then you will be interested in the settings
circled on the ri
set you are using and press
below from which you can choose a different mark. The contrast is
illustrated below.
Two Variable Statistics
As with univariate statistics, summary statistics are
available through the
Pressing this key changes to a screen which lists the following:
Σ Σ
MEANX, X,
2 , Σ ,
Σ
Y XY SCOV
See page 131 for information on
x y
i i
1 2
1 3
2 2
5 7
6 6
5 7
4 3
5 6
6 4
2 2
l
ght. If you move the hi
key in the view.
NUM
2
Σ
X , MEANY, Y,
, , and
PCOV CORR
RelErr
We will use the set of data shown in the
table on the left to go through the analysis
process a second time and this time
examine the line of best fit.
Enter the data into the
switch to the
SYMB
(data set 1) is set to
S1
ed, and that the fit is linear. If not,
the fit can be changed in the
view.
SETUP
ghlig ht onto the mark for the data
then you will see the menu shown
.
RELERR
.
view and then
NUM
view. Make sure that
and ,
C1 C2
SYMB
128
l