Running Total And Statistics Calculations; Introduction; The Sum Menu - HP -18C Owner's Manual

Running Total and
Statistics Calculations
Introduction
6
The SUM menu is used to calculate the running total of a list of num-
bers and to do statistical calculations. As you enter the numbers, the
HP -18C displays the running total. Once the list of numbers has been
entered, you can:
• Calculate the mean, median, standard deviation, and/or range
(largest number minus the smallest number).
• Display the largest (maximum) and smallest (minimum) number in
the list.
• Sort the list from smallest number to largest number.
• Do curve-fitting and forecasting calculations using two SUM lists
and one of four models-linear, exponential, logarithmic, and
power. (Curve fitting for the linear model is called
linear regression.)
The SUM Menu
To display the SUM menu, press . . in the
MAIN
menu. If you
haven't previously used the SUM menu, the HP-18C displays an
empty SUM number list.
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