How to Delete and Edit Data on the TI-84 Plus
Sooner or later you’ll have to remove or modify the statistical data that you’ve placed in a data list in the TI-84 Plus calculator. The following list shows you how to do so:
Deleting a data list from the memory of the calculator:
To permanently remove a data list from the memory of the calculator, press [2nd][+] to enter the Memory Management menu. Then press  to see the data lists that are stored in memory. Use
to move the indicator to the list you want to delete, and then press [DEL] to delete that list. When you’re finished deleting lists from memory, press [2nd][MODE] to exit (quit) the Memory Management menu and return to the Home screen.
Although the calculator does allow you to delete a default list (L1 through L6) from memory, in reality, it deletes only the contents of the list and not its name.
Clearing the contents of a data list:
When you clear a data list, the list’s contents (and not its name) will be erased, leaving an empty data list in the calculator’s memory. To clear the contents of a data list in the Stat List editor, use the
keys to place the cursor on the name of a list appearing in a column heading, and then press [CLEAR][ENTER].
Deleting a column (list) in the Stat list editor:
To delete a column (list) from the Stat List editor, use the
keys to place the cursor on the name of the list appearing in the column headings, and then press [DEL]. The list will be removed from the Stat List editor but not from the memory of the calculator.
Deleting an entry in a data list:
To delete an entry from a data list, use the
keys to place the cursor on that entry, and then press [DEL] to delete the entry from the list.
Editing an entry in a data list:
To edit an entry in a data list, use the
keys to place the cursor on that entry, press [ENTER], and then edit the entry or key in a new entry. If you key in the new entry, the old entry is automatically erased. Press [ENTER] when you’re finished editing or replacing the old entry.