The instructions on this page also work for the TI-83 Plus and the TI-83 Plus Silver Edition.

The position of the graphically represented keys can be found by moving your mouse on top of the graphic. 

Turn your calculator on
Press Bottom Left Corner.
Clearing the memory
Press Row 2, Column 3.  The word EDIT should be highlighted (if not, arrow over to it).  You should see five choices; the fourth is 4:ClrList.  Press Row 7, Column 2.  The screen will now say ClrList. Specify lists one and two, by pressing Row 1, Column 1 Row 8, Column 2 (you should see L1 above the key), then  Row 5, Column 2 Row 1, Column 1 Row 8, Column 3 (you should see L2 above the key).  The screen will now say ClrList L1, L2.  Press Bottom Right Corner.  Calculator will say Done signifying a clear memory.

 

Entering data
one variable
Press Row 2, Column 3.  Press Row 8, Column 2 (you should see 1:Edit on the screen).  You should see 3 columns: L1, L2, L3.  The cursor should be at L1 (if not, arrow over to it).  Type in the first number, then Bottom Right Corner.  Type in the second number, then Bottom Right Corner.  When finished, press Row 1, Column 1 Row 1, Column 2 (you should see the word QUIT above the key).
two variables
Press Row 2, Column 3.  Press Row 8, Column 2 (you should see 1:Edit on the screen).  You should see 3 columns: L1, L2, L3.  The cursor should be at L1 (if not, arrow over to it).  Type in the first x-value, then Bottom Right Corner.  Repeat until all x-values are entered.  Press .  The cursor should jump to the top of the second column, L2.  Enter the  y-values (make sure they line up with the corresponding x values).  When finished, press Row 1, Column 1 Row 1, Column 2 (you should see the word QUIT above the key).

 

Calculating one-variable statistics
mean (x)
Press Row 2, Column 3.  Use the blue to move the highlighted bar over the CALC menu.  Choose the 1-Var stats option (that is, press Row 8, Column 2).  You'll see the words 1-Var Stats on the screen.  Press Row 1, Column 1 Row 8, Column 2 (you should see L1 above the key).  You'll see the words 1-Var Stats L1 on the screen.  Press Bottom Right Corner.  The mean is the top value on the screen. 
standard deviation for populations (s or sn)
Press Row 2, Column 3.  Use the blue to move the highlighted bar over the CALC menu.  Choose the 1-Var stats option (that is, press Row 8, Column 2).  You'll see the words 1-Var Stats on the screen.  Press Row 1, Column 1 Row 8, Column 2 (you should see L1 above the key).  You'll see the words 1-Var Stats L1 on the screen.  Press Bottom Right Corner.  The population standard deviation is the fifth value on the screen. 
standard deviation for samples (s or sn-1)
Press Row 2, Column 3.  Use the blue to move the highlighted bar over the CALC menu.  Choose the 1-Var stats option (that is, press Row 8, Column 2).  You'll see the words 1-Var Stats on the screen.  Press Row 1, Column 1 Row 8, Column 2 (you should see L1 above the key).  You'll see the words 1-Var Stats L1 on the screen.  Press Bottom Right Corner.  The sample standard deviation is the fourth value on the screen. 

Calculating two-variable statistics
r (correlation)
The TI-83 will only display the correlation in the DiagnosticOn mode.  If it's in this mode, go to the next paragraph.  If it's not (and it probably isn't), press Row 1, Column 1 Row 9, Column 2  (you should see the word CATALOG above the key).  You'll see a screen with an alphabetical list of commands.  Arrow down to DiagnosticOn.  Press Bottom Right Corner.  The screen will now say DiagnosticOn.  Press Bottom Right Corner again.  You will see the word Done.  You can continue now. 

Press Row 2, Column 3.   Use the blue to move the highlighted bar over the CALC menu.  Choose the LinReg(a+bx) option (that is, press Row 6, Column 3).  You'll see the words LinReg(a+bx) on the screen.  Press Row 1, Column 1 Row 8, Column 2 (you should see L1 above the key), then  Row 5, Column 2 Row 1, Column 1 Row 8, Column 3 (you should see L2 above the key).  You'll see the words LinReg(a+bx) L1,L2 on the screen.  Press Bottom Right Corner.  The correlation is the fourth number in the list (r = ..).  [NOTE: You can also find correlation by pressing 4: LinReg(ax+b), instead of 8: LinReg(a+bx).  In this case, the roles of the a and b are switched, but r is the same.]
regression coefficients
slope
Press Row 2, Column 3.  Use the blue to move the highlighted bar over the CALC menu.  Choose the LinReg(a+bx) option (that is, press Row 6, Column 3).  You'll see the words LinReg(a+bx) on the screen.  Press Row 1, Column 1 Row 8, Column 2 (you should see L1 above the key), then  Row 5, Column 2 Row 1, Column 1 Row 8, Column 3 (you should see L2 above the key).  You'll see the words LinReg(a+bx) L1,L2 on the screen.  Press Bottom Right Corner.  The slope is the second number in the list. (b = ....).  NOTE: You can also find correlation by pressing 4: LinReg(ax+b), instead of 8: LinReg(a+bx).  In this case, the roles of the a and b are switched, but r is the same.]
y-intercept
Press Row 2, Column 3.  Use the blue to move the highlighted bar over the CALC menu.  Choose the LinReg(a+bx) option (that is, press Row 6, Column 3).  You'll see the words LinReg(a+bx) on the screen.   Press Row 1, Column 1 Row 8, Column 2 (you should see L1 above the key), then  Row 5, Column 2 Row 1, Column 1 Row 8, Column 3 (you should see L2 above the key).  You'll see the words LinReg(a+bx) L1,L2 on the screen.  Press Bottom Right Corner.  The y-intercept is the first number in the list (a = ....).  NOTE: You can also find correlation by pressing 4: LinReg(ax+b), instead of 8: LinReg(a+bx).  In this case, the roles of the a and b are switched, but r is the same.]


Calculating combinations and permutations
combinations (nCr)
Enter the n value. Press Row 3, Column 1.  You should see modes across the top of the screen.  You want the fourth mode: PRB (arrow right three times).   You will see several options: nCr is the third.  Press Row 8, Column 4.  Enter the r value.  Press Bottom Right Corner.
permutations (nPr)
Enter the n value.  Press Row 3, Column 1.  You should see modes across the top of the screen.  You want the fourth mode: PRB (arrow right three times).   You will see several options: nPr is the second.  Press Row 8, Column 3.  Enter the r value.  Press Bottom Right Corner.

 

Turning the calculator off
Press Top Left Corner, It's Yellow Bottom Left Corner.

 

Worked Out Examples

In the following examples, we list the exact key sequence used to find the answer.  We will list the keys by the main symbol on the key.  In parentheses, we will list a helpful mnemonic, e.g. we will list ex as (ex).

A: What is the mean and standard deviation of the following list of numbers?

15      16      20      21

1: Clear Memory  Row 2, Column 3 Row 7, Column 2 Row 1, Column 1 Row 8, Column 2 (L1) Row 5, Column 2 Row 1, Column 1 Row 8, Column 3 (L2)  Bottom Right Corner
2: Enter Data  Row 2, Column 3 Row 8, Column 2 Row 8, Column 2 Row 7, Column 3 Bottom Right Corner Row 8, Column 2 Row 7, Column 4 Bottom Right Corner Row 8, Column 3 Row 9, Column 2 Bottom Right Corner Row 8, Column 3 Row 8, Column 2 Bottom Right Corner Row 1, Column 1 Row 1, Column 2  
3: Compute the mean   Row 2, Column 3 (CALC) Row 8, Column 2 (1-Var Stats) Row 1, Column 1 Row 8, Column 2 (L1)  Bottom Right Corner 
4: Compute the standard deviation (population)  Row 2, Column 3 (CALC) Row 8, Column 2 (1-Var Stats) Row 1, Column 1 Row 8, Column 2 (L1)  Bottom Right Corner 
5: Compute the standard deviation (sample)  Row 2, Column 3 (CALC) Row 8, Column 2 (1-Var Stats) Row 1, Column 1 Row 8, Column 2 (L1)  Bottom Right Corner 


    You should get a mean of 18, population standard deviation of 2.549509757 and a sample standard deviation of 2.943920289.

B: Find the linear regression line for the following table of numbers. Also find the correlation.

x 1 2 3 4
y 2 4 5 7

1: Clear Memory  Row 2, Column 3 Row 1, Column 1 Row 8, Column 2 (L1) Row 5, Column 2 Row 1, Column 1 Row 8, Column 3 (L2)  Bottom Right Corner
2: Enter Data  Row 2, Column 3 Row 8, Column 2 (1:Edit) Row 8, Column 2 Bottom Right Corner Row 8, Column 3 Bottom Right Corner Row 8, Column 4 Bottom Right Corner Row 7, Column 2 Bottom Right Corner  Row 8, Column 3 Bottom Right Corner Row 7, Column 2 Bottom Right Corner Row 7, Column 3 Bottom Right Corner Row 6, Column 2 Bottom Right Corner Row 1, Column 1 Row 1, Column 2 (QUIT) 
3: Compute the slope of the regression line   Row 2, Column 3 (CALC) Row 6, Column 3 (LinReg(a+bx)) Row 1, Column 1 Row 8, Column 2 (L1) Row 5, Column 2 Row 1, Column 1 Row 8, Column 3 (L2) Bottom Right Corner
4: Compute the y-intercept of the regression line  Row 2, Column 3 (CALC) Row 6, Column 3 (LinReg(a+bx)) Row 1, Column 1 Row 8, Column 2 (L1) Row 5, Column 2 Row 1, Column 1 Row 8, Column 3 (L2) Bottom Right Corner
5: Compute the correlation  Row 2, Column 3 (CALC) Row 6, Column 3 (LinReg(a+bx)) Row 1, Column 1 Row 8, Column 2 (L1) Row 5, Column 2 Row 1, Column 1 Row 8, Column 3 (L2) Bottom Right Corner

    You should get a slope of 1.6, a y-intercept of 0.5, and a correlation of 0.992277876.
    The regression line would be: y = 1.6x+0.5.

C: Find 10C6 and 9P5.

1: Compute 10C6  Row 8, Column 2 Row 9, Column 2 Row 3, Column 1 (PRB) Row 8, Column 4 (nCr) Row 7, Column 4 Bottom Right Corner
2: Compute 9P5  Row 8, Column 4 Row 3, Column 1 (PRB) (nPr) Row 7, Column 3 Bottom Right Corner


You should get 10C6 = 210 and 9P5= 15120.

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Basic Stats Statistical Graphs Normal Probabilities Hypothesis tests Confidence Intervals
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