HP 39g Graphing Calculator User's Guide Page 39

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Getting started 1-29
Differences between the HP 38G and the
HP 39G/40G
CAS The HP 40G is packaged with a computer algebra system
(CAS). Refer to the CAS Manual for further information.
Memory
manager
The HP 39G/40G incorporates a memory manager that you
can use to see how much memory the objects that you have
created or loaded are occupying. See “Memory Manager” on
page 11-9 for more information.
Plot Goto
function
In Plot view, you can use the menu key to jump to a
value on the plot instead of having to trace the plot to locate
values. See “Exploring the graph” on page 2-7 for more
information.
Statistics Pred
function
When you choose the option in the Statistics aplet’s Plot
view screen, it is now possible to
along the regression
curve. Once a data set and regression curve is displayed,
pressing the up and down arrows will move between the data
and the curve of regression. When the regression curve is
selected, the values displayed in the Plot view status line are
the PREDY values. On the HP 38G, the Trace function would
select known data points only.
Inference aplet To complement the Statistics aplet, a new Inference aplet has
been added. Use this aplet to perform hypothesis tests and
determine confidence intervals. See “About the Inference
aplet” on page 9-1 for more information.
Trig Explorer
and Quadratic
Explorer
aplets
The teaching aplets Trig Explorer and Quadratic Explorer
have been added to the calculator. These two aplets add
powerfully to the capabilities of the calculator in the
classroom.
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