HP 39gs Master Manual page 134

There are two ways to obtain these values. You can type them into the
view using the
HOME ALPHA
instead.
If you press and then the screen key labeled
VARS
assuming the Statistics aplet is active, you will see the view above right.
Scroll down to the Stat-One variables and then press the right arrow.
This puts you in the list (see right) of univariate summary statistics. If you
highlight one and press
into the view for use. People often find it easier to simply type
HOME
them. You can obtain the summation sign in
Calculator Tip
The values of the mean and standard deviation retrieved are those of
the
NUM
secondly press the
values you want. This ensures that the ones you retrieve in the
view are the ones you want.
This technique can also be used for bivariate data in exactly the same manner. You should ensure, as per the
note above, that only the set of data you want to use is
All the usual values are retrievable, with the exception that there is no way to provided to retrieve the
coefficients of the line of best fit, since they appear in the
If we now switch to the
them in a calculation to find the upper and lower cut off points for
acceptance of data.
As you can see on the left, the range for acceptance is -3.46 to 10.38,
which makes the value of 55 almost certainly an error.
key, or you can use the
then the variable name will be pasted
ENTER
Mean
last set calculated If you have more than one set of data in the .
view then firstly un
view, we can recall these values and use
HOME
key
VARS
then,
Σ
by using .
SHIFT +
all except the one you want, and
key in order to force a calculation of the
ed and that
screen rather than the
SYMB
134
HOME
have been displayed for it.
screen.