T I 34 Title

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

Turn your calculator on
Press The A C ON Key: Row 1, Column 5.
Clearing the memory
I'm not certain. But I think that getting out of stat mode will clear the stat registers. So press The MODE Key: Row 4, Columns 3 and 4 The One Key: Row 8, Column 2 The MODE Key: Row 4, Columns 3 and 4 The Five Key: Row 7, Column 3 

 

Entering data
one variable
Press The MODE Key: Row 4, Columns 3 and 4 The Five Key: Row 7, Column 3 (you should see STAT above the 5) to get into STAT mode. Enter the first value. Press The Sigma Plus Key: Row 5, Column 1. Enter the second value and press 
two variables
The TI-34 does not do regression.

 

Calculating one-variable statistics
mean (x)
Press The Second Key: Row 4, Columns 1 and 2 The Four Key: Row 7, Column 2. (You should see x above the 4 key.)
standard deviation for populations (s or sn)
Press The Second Key: Row 4, Columns 1 and 2 The Six Key: Row 7, Column 4. (You should see sn above the 6 key.)
standard deviation for samples (s or sn-1)
Press The Second Key: Row 4, Columns 1 and 2 The Five Key: Row 7, Column 3. (You should see sn-1 above the 5 key.)

Calculating two-variable statistics
r (correlation)
The TI-34 does not do regression.
regression coefficients
slope
The TI-34 does not do regression.
y-intercept
The TI-34 does not do regression.


Calculating combinations and permutations
combinations (nCr)
There is no direct command, but there is a factorial key. You could use the formula: nCr = n C r formula. Enter n and press The Second Key: Row 4, Columns 1 and 2 The Sum Key: Row 8, Column 1 The Divided By Key: Row 4, Column 5. Enter r and press The Second Key: Row 4, Columns 1 and 2 The Sum Key: Row 8, Column 1 The Divided By Key: Row 4, Column 5. Enter (n-r) and press The Second Key: Row 4, Columns 1 and 2 The Sum Key: Row 8, Column 1 The Equals Key: Rows 8 and 9, Column 5.
permutations (nPr)
There is no direct command, but there is a factorial key. You could use the formula: nPr = n P r permuation formula. Enter n and press The Second Key: Row 4, Columns 1 and 2 The Sum Key: Row 8, Column 1 The Divided By Key: Row 4, Column 5. Enter r and press The Second Key: Row 4, Columns 1 and 2 The Sum Key: Row 8, Column 1 The Equals Key: Rows 8 and 9, Column 5.

 

Turning the calculator off
It's solar so it doesn't turn off.

 

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   The MODE Key: Row 4, Columns 3 and 4 The One Key: Row 8, Column 2 The MODE Key: Row 4, Columns 3 and 4 The Five Key: Row 7, Column 3 
2: Enter Data  The MODE Key: Row 4, Columns 3 and 4 The Five Key: Row 7, Column 3 The One Key: Row 8, Column 2 The Five Key: Row 7, Column 3 The Sigma Plus Key: Row 5, Column 1 The One Key: Row 8, Column 2 The Six Key: Row 7, Column 4 The Sigma Plus Key: Row 5, Column 1 The Two Key: Row 8, Column 3 The Zero Key: Row 9, Column 2 The Sigma Plus Key: Row 5, Column 1 The Two Key: Row 8, Column 3 The One Key: Row 8, Column 2 The Sigma Plus Key: Row 5, Column 1
3: Compute the mean   The Second Key: Row 4, Columns 1 and 2 The Four Key: Row 7, Column 2 (x)
4: Compute the population standard deviation  The Second Key: Row 4, Columns 1 and 2 The Six Key: Row 7, Column 4 (sn)
5: Compute the sample standard deviation  The Second Key: Row 4, Columns 1 and 2 The Five Key: Row 7, Column 3 (sn-1)


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

C: Find 10C6 and 9P5.

1:Compute 10C6

 The One Key: Row 8, Column 2 The Zero Key: Row 9, Column 2 The Second Key: Row 4, Columns 1 and 2 The Sum Key: Row 8, Column 1 The Divided By Key: Row 4, Column 5 The Six Key: Row 7, Column 4 The Second Key: Row 4, Columns 1 and 2 The Sum Key: Row 8, Column 1 The Divided By Key: Row 4, Column 5 The Four Key: Row 7, Column 2 The Second Key: Row 4, Columns 1 and 2 The Sum Key: Row 8, Column 1 The Equals Key: Rows 8 and 9, Column 5
2: Compute 9P5  The Nine Key: Row 6, Column 4 The Second Key: Row 4, Columns 1 and 2 The Sum Key: Row 8, Column 1 The Divided By Key: Row 4, Column 5 The Five Key: Row 7, Column 3 The Second Key: Row 4, Columns 1 and 2 The Sum Key: Row 8, Column 1 The Equals Key: Rows 8 and 9, Column 5 


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

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