HP 39gs Master Manual page 115

Sorting data
The key labeled inserts space for a new number by shifting all the
numbers down one space.
data into ascending or descending order. The extra fields in the screen
shot right are used with bivariate sorts or frequency tables and will be
explained in that section of the notes. Press
The key provides access to a larger font size and
last key labeled
The STATS key
Making sure the highlight is in column
you will see the screen shown right. If you use the down arrow, you can
scroll down and see the rest of the screen (below right).
NOTE: If you get an error message instead of summary statistics, you
may have forgotten to
the view defines columns which don't actually have any data in
SYMB
them then errors will result.
As you can see in the screens above right, the calculator gives not only the standard statistics that any
scientific calculator would give, but also the minimum and maximum values, the median and the upper and
lower quartile cutoffs. The mode is not given, but this is easily obtained from the histogram as we will see
later.
Functions of columns
Let's create a second column of data with all its values exactly double the values in the first column. We can
use the view to avoid having to retype the values as follows...
HOME
Change to the
• HOME
then press
ENTER
keys at the bottom of the screen.
Press the
• NUM
should find your new column created and ready.
If you now use the
reason for this is that you have not set up the second column in the
recognize column 1 as 'in use' and so we didn't need to do this before now.
does exactly what it says... it sorts the
is the really useful one.
, press the
C1
the aplet before beginning this process. If
view and type the command shown right,
. The command is found on the screen
key to change back to the
key, you will find that you still only see statistics for the first column (
to stop the sort.
vs.
key and
view. You
NUM
SYMB
115
we have already discussed. The
). The
H1
view. The default setup is to