Texas Instruments TI-89 Manual Book page 277

The Calculate
Dialog Box
(Continued)
Note: For an example of
using Freq, Category, and
Include Categories, refer to
page 270.
Note: Any undefined data
points (shown as undef ) are
ignored in a stat calculation.
Redisplaying the
Screen
STAT VARS
260 Chapter 16: Statistics and Data Plots
Item Description
Type the column number that contains a
Freq
"weight" value for each data point. If you do
not enter a column number, all data points are
assumed to have the same weight (
Type the column number that contains a
Category
category value for each data point.
If you specify a
Include
Categories this item to limit the calculation to specified
category values. For example, if you specify
{
a category value of
3. Press ¸ (after typing in an input box, press ¸ twice).
The results are displayed on the
depends on the
Calculation Type
For Calculation Type = OneVar
When 6 is shown instead of =, you
can scroll for additional results.
4. To close the
STAT VARS
The Data/Matrix Editor's
calculation results (until they are cleared from memory).
: 2 ‰
TI-89
‰
TI-92 Plus:
Previous results are cleared when you:
¦
Edit the data points or change the
¦
Open another data variable or reopen the same data variable
(if the calculation referred to a column in a data variable). Results
are also cleared if you leave and then reopen the Data/Matrix
Editor with a data variable.
¦
Change the current folder (if the calculation referred to a list
variable in the previous folder).
Category
1,4 }, the calculation uses only data points with
or
1
STAT VARS
. For example:
For Calculation Type = LinReg
screen, press ¸.
toolbar menu redisplays the previous
Stat
Calculation Type
).
1
column, you can use
.
4
screen. The format
.