F. 6:Statistics
Press
.
Use
and
to select the menu of choice. 
Not all options are given in the entry format. Options that are used frequently will be included, but others are omitted from the table. For a complete format listing, you can check the TI89 manual. Results in complex mode are not covered. They can be found in the manual.
Operation

Entry Format

Explanation

Screen


1:OneVar  OneVar list1  Calculates
1variable statistics and updates all the system variables. The list must be saved before the operation is used. Use the and keys to store the name. Then ShowStats is used by pressing . 

2:TwoVar  TwoVar list1, list2 
Calculates the 2variable statistics 

3:Regressions 
For all these regression operations, lists
must be 

LinReg list1,list2  Linear regression.  
All of the operations follow the same steps as shown for the linear regression.  
4:mean  mean(list)  Returns the mean of
the elements in the list. 

5:variance  variance(list)  Returns the variance of the list.  
6:stdDev  stdDev(list)  Returns the standard
deviation of the elements in the list. 

7:median  median(list)  Returns the median of the list.  
8:ShowStat  ShowStat  Displays a dialog
box containing the last computed statistics results. 