TI-84 Lists of Data Store the data values to be analyzed using statistical techniques

2 ND QUIT is an important command First a word about 2 ND QUIT: – 2 ND QUIT gets you out of unwanted menus – 2 ND QUIT clears some errors that CLEAR won’t 2 ND QUIT is so useful, they made it easy to type. – Press 2 ND at top left – and next door to it, press the MODE key

Completely Clear Out Your Calculator “Reset all RAM” Why do this? – A cheap and easy way to clear out all lists of data that might be leftovers from previous work – Whenever some error is happening and you suspect it’s due to some leftover junk – Always at the beginning of an exam in this course A gigantic erase that resets everything

How to “Reset All RAM” 2 ND MEM (on the + key) 7:Reset… 1:All RAM… 2:Reset

How to put data into a list STAT 1:Edit… List names L1, L2, L3 (and more beyond that) The cursor is in the first cell of list L1

Put in these values Put the values 100, 90, 85, 80, 75, 70, 65, 60, 0 into list L1. Type the numbers, pressing ENTER after each Notice that L1(10) at bottom means that your cursor is at position #10 in list L1.

Put in these values Press right arrow to jump into list L2 Put the values -20, 0, 15, 40, 55, 45 into list L2. Cursor up and change the 40 to a 44. Use 2 ND QUIT if you wanted to escape the list editor and return to the Home Screen.

Calculate some statistics for list L1 STAT CALC submenu 1:1-Var Stats ENTER ∑x=625 is the sum of all the values in list L1 (Greek letter ∑, capital “sigma”) N=9 is the count of how many data values are in list L1. Other lines’ meanings coming soon.

Calculate some statistics for list L2 STAT, CALC, 1:1-Var Stats again But do not hit ENTER yet! 2 ND 2 puts list name L2 into the command The full command should say 1-Var Stats L2 Then ENTER When we did 1-Var Stats without a list name, it defaulted to list L1.

Erase List L1 STAT, 1:Edit… again Move cursor on top of the L1 list name Press CLEAR. Press Down Arrow. Observe – it’s now empty.

Another way to erase a list List L2 could be erased the same way But let’s learn another way to erase a list STAT, 4:ClrList 2 ND 2 to put list name L2 into the command ENTER

Clearing more than one list at a time Suppose we wanted to clear lists L2 and L3 both in a single command After 2 ND 2 to put list L2 into the command… … comma 2 ND 3 to put list L3 into the command, too Then ENTER (also ClrAllLists in the TI-84 “Catalog”.)