The position of the graphically represented keys can be found by moving your mouse on top of the graphic. 
The row of function keys (F1, F2...) constitutes the first row.

Turn your calculator on
Press The ON Key: Row 10, Column 1.
Clearing the memory
In the EDIT mode, arrow until you get the cursor in the 1-1 position. Press The N X T Key: Row 3, Column 3. You'll see new menu tags. Press The F4 Key: Row 1, Column 4 ( -COL, meaning delete column) once or twice, depending on how many columns you have.

 

Entering data
one variable
Press The Orange Arrow Key: Row 9, Column 1 The Five Key: Row 8, Column 3 to get into STAT mode. A menu will appear. (HP calls this a CHOOSE box.) Press The Enter Key: Row 10, Column 5 to accept 1.Single Var.. A new screen will appear with a cursor on the first line, labeled SDAT. Press The F1 Key: Row 1, Column 1 (EDIT) and a spreadsheet will appear. Press The F6 Key: Row 1, Column 6 (to ensure the cursor goes in the right direction: down.)  Now enter the numbers in your list, pressing The Enter Key: Row 10, Column 5 after each one. Press The Enter Key: Row 10, Column 5 one more time to get back to the previous menu.
two variables
Press The Orange Arrow Key: Row 9, Column 1 The Five Key: Row 8, Column 3 to get into STAT mode. A menu will appear. (HP calls this a CHOOSE box.) Press The Three Key: Row 9, Column 4 for Fit Data.. and  The Enter Key: Row 10, Column 5 (or The F6 Key: Row 1, Column 6) to accept it. A new screen will appear with a cursor on the first line, labeled SDAT. Press The F1 Key: Row 1, Column 1 (EDIT) and a spreadsheet will appear. Press The F5 Key: Row 1, Column 5 (to ensure the cursor goes in the right direction: down.)  Enter the first x-value and press The Enter Key: Row 10, Column 5. Enter the first y-value and press The Enter Key: Row 10, Column 5 The Down Arrow: Row 2, between Columns 4 and 5 The Left Arrow Key: Between rows 1 and 2, Column 4 The Left Arrow Key: Between rows 1 and 2, Column 4 to get to the next row. Type in the remaining ordered pairs in the same way: x-value, The Enter Key: Row 10, Column 5 , y-value, The Enter Key: Row 10, Column 5 The Down Arrow: Row 2, between Columns 4 and 5 The Left Arrow Key: Between rows 1 and 2, Column 4 The Left Arrow Key: Between rows 1 and 2, Column 4. Press The Enter Key: Row 10, Column 5 one more time to get back to the previous menu. The third line should read: Model: Linear Fit.

Note: you can also type in the x-values first and then the y-values, whichever you find more convenient. Just make sure your data is in two columns.

 

Calculating one-variable statistics
mean (x)

1. Press The Orange Arrow Key: Row 9, Column 1 The Five Key: Row 8, Column 3 to get into STAT mode. A menu will appear. (HP calls this a CHOOSE box.) Press The Enter Key: Row 10, Column 5 to accept 1.Single Var.. A new screen will appear with a cursor on the line labeled SDAT. If you have just finished entering data, this first step is redundant.

2. Press The Down Arrow: Row 2, between Columns 4 and 5 to Type: Sample

3. Press The Down Arrow: Row 2, between Columns 4 and 5 to this chart. The cursor will be in StdDev

__Mean

__StdDev

__Variance

__Total

__Maximum

__Minimum 
 

4. Press The F3 Key: Row 1, Column 3 (says CHK on the menu) for the ones you want:
We want Mean and StdDev, so The F3 Key: Row 1, Column 3 (for StdDev) The Left Arrow Key: Between rows 1 and 2, Column 4  The F3 Key: Row 1, Column 3 (for Mean). Check the other ones if you want

(Warning: this StdDev is the sample standard deviation, see below if you want the population standard deviation.)

5. Now press The F 6 Key: Row 1, Column 6 (for OK)

The screen will show you the values you want.

standard deviation for populations (s or sn)
Same as for the mean, but in step 2, there is an extra step 2a:

2a: Press The F 2 Key: Row 1, Column 2 (CHOOS) The Down Arrow: Row 2, between Columns 4 and 5 The Enter Key: Row 10, Column 5

standard deviation for samples (s or sn-1)
Same as for mean.

Calculating two-variable statistics
r (correlation)
After entering the data, simply press The F6 Key: Row 1, Column 6 (OK). Three lines will appear. The second line has the correlation. It's labeled so you can't miss it.
regression coefficients
slope
After entering the data, simply press The F6 Key: Row 1, Column 6 (OK). Three lines will appear. The top line (3:) has the regression equation written in a+bx form. b is the slope.
y-intercept
After entering the data, simply press The F6 Key: Row 1, Column 6 (OK). Three lines will appear. The top line (3:) has the regression equation written in a+bx form. a is the y-intercept.


Calculating combinations and permutations
combinations (nCr)
In RPN mode: Enter n. Press The Enter Key: Row 10, Column 5. Enter r. Press The Bent Left Key: Row 8, Column 1 The Symb Key: Row 4, Column 4 (to get into MTH or Math mode) The Seven Key: Row 7, Column 2 (For Probability) The Enter Key: Row 10, Column 5 The Enter Key: Row 10, Column 5 (to accept 1: COMB)

In ALG mode: Press The Bent Left Key: Row 8, Column 1 The Symb Key: Row 4, Column 4 (to get into MATH mode) The Seven Key: Row 7, Column 2 (For Probability) The Enter Key: Row 10, Column 5 The Enter Key: Row 10, Column 5 (to accept 1: COMB). The word COMB( will appear on the screen. Enter n. Press The Orange Arrow Key: Row 9, Column 1 The S P C (space) Key: Row 10, Column 4 (for a comma). Enter r and press The Enter Key: Row 10, Column 5.
permutations (nPr)
In RPN mode: Enter n. Press The Enter Key: Row 10, Column 5. Enter r. Press The Bent Left Key: Row 8, Column 1 The Symb Key: Row 4, Column 4 (to get into MATH mode) The Seven Key: Row 7, Column 2 (For Probability) The Enter Key: Row 10, Column 5 The Two Key: Row 9, Column 3 (for 2: PERM) The Enter Key: Row 10, Column 5.

In ALG mode: Press The Bent Left Key: Row 8, Column 1 The Symb Key: Row 4, Column 4 (to get into MATH mode) The Seven Key: Row 7, Column 2 (For Probability) The Enter Key: Row 10, Column 5 The Two Key: Row 9, Column 3 (for 2: PERM) The Enter Key: Row 10, Column 5. Enter n. Press The Orange Arrow Key: Row 9, Column 1 The S P C (space) Key: Row 10, Column 4 (for a comma). Enter r and press The Enter Key: Row 10, Column 5.

 

Turning the calculator off
Press The Orange Arrow Key: Row 9, Column 1 The ON Key: Row 10, Column 1. (You should see OFF written above right of the key.)

 

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 N X T Key: Row 3, Column 3 The F4 Key: Row 1, Column 4 ( -COL)
2: Enter Data  The Orange Arrow Key: Row 9, Column 1 The Five Key: Row 8, Column 3 (STAT) The Enter Key: Row 10, Column 5 (1.Single Var) The F1 Key: Row 1, Column 1 (EDIT) The F6 Key: Row 1, Column 6 (GO down) The One Key: Row 9, Column 2 The Five Key: Row 8, Column 3 The Enter Key: Row 10, Column 5 The One Key: Row 9, Column 2 The Six Key: Row 8, Column 4 The Enter Key: Row 10, Column 5 The Two Key: Row 9, Column 3 The Zero Key: Row 10, Column 2 The Enter Key: Row 10, Column 5 The Two Key: Row 9, Column 3 The One Key: Row 9, Column 2 The Enter Key: Row 10, Column 5 The Enter Key: Row 10, Column 5
3: Compute the mean

 [The Orange Arrow Key: Row 9, Column 1 The Five Key: Row 8, Column 3 (STAT) The One Key: Row 9, Column 1 (1.single variable), if necessary.] The Down Arrow: Row 2, between Columns 4 and 5  The Down Arrow: Row 2, between Columns 4 and 5 The F3 Key: Row 1, Column 3 (StdDev) The Left Arrow Key: Between rows 1 and 2, Column 4  The F3 Key: Row 1, Column 3 (Mean) The F 6 Key: Row 1, Column 6 (OK)
4: Compute the population standard deviation [ The Orange Arrow Key: Row 9, Column 1 The Five Key: Row 8, Column 3 (STAT) The One Key: Row 9, Column 1 (1.single variable), if necessary.] The Down Arrow: Row 2, between Columns 4 and 5 The F 2 Key: Row 1, Column 2 (CHOOS) The Down Arrow: Row 2, between Columns 4 and 5 The Enter Key: Row 10, Column 5 The Down Arrow: Row 2, between Columns 4 and 5 The F3 Key: Row 1, Column 3 (StdDev) The Left Arrow Key: Between rows 1 and 2, Column 4  The F3 Key: Row 1, Column 3 (Mean) The F 6 Key: Row 1, Column 6 ( OK) 
5: Compute the sample standard deviation [The Orange Arrow Key: Row 9, Column 1 The Five Key: Row 8, Column 3 (STAT) The One Key: Row 9, Column 1 (1.single variable), if necessary.] The Down Arrow: Row 2, between Columns 4 and 5  The Down Arrow: Row 2, between Columns 4 and 5 The F3 Key: Row 1, Column 3 (StdDev) The Left Arrow Key: Between rows 1 and 2, Column 4  The F3 Key: Row 1, Column 3 (Mean) The F 6 Key: Row 1, Column 6 (OK)


    You should get a mean of 18, population standard deviation of 2.5495097568 and a sample standard deviation of 2.94392028878.

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  The N X T Key: Row 3, Column 3 The F4 Key: Row 1, Column 4 The F4 Key: Row 1, Column 4 ( -COL)
2: Enter Data  The Orange Arrow Key: Row 9, Column 1 The Five Key: Row 8, Column 3 (STAT)The Three Key: Row 9, Column 4 (Fit Data) The F1 Key: Row 1, Column 1 (EDIT) The F5 Key: Row 1, Column 5 (GO right) The One Key: Row 9, Column 2 The Enter Key: Row 10, Column 5 The Two Key: Row 9, Column 3 The Enter Key: Row 10, Column 5 The Down Arrow: Row 2, between Columns 4 and 5 The Left Arrow Key: Between rows 1 and 2, Column 4 The Left Arrow Key: Between rows 1 and 2, Column 4 The Two Key: Row 9, Column 3 The Enter Key: Row 10, Column 5 The Four Key: Row 8, Column 2 The Enter Key: Row 10, Column 5 The Down Arrow: Row 2, between Columns 4 and 5 The Left Arrow Key: Between rows 1 and 2, Column 4 The Left Arrow Key: Between rows 1 and 2, Column 4 The Three Key: Row 9, Column 4 The Enter Key: Row 10, Column 5 The Five Key: Row 8, Column 3 The Enter Key: Row 10, Column 5 The Down Arrow: Row 2, between Columns 4 and 5 The Left Arrow Key: Between rows 1 and 2, Column 4 The Left Arrow Key: Between rows 1 and 2, Column 4 The Four Key: Row 8, Column 2 The Enter Key: Row 10, Column 5 The Seven Key: Row 7, Column 2 The Enter Key: Row 10, Column 5 The Down Arrow: Row 2, between Columns 4 and 5 The Left Arrow Key: Between rows 1 and 2, Column 4 The Left Arrow Key: Between rows 1 and 2, Column 4 The Enter Key: Row 10, Column 5
3: Compute the slope of the regression line  The F6 Key: Row 1, Column 6 (OK) top line (the second number. It's next to the x) 
4: Compute the y-intercept of the regression line  The F6 Key: Row 1, Column 6 (OK) top line (the first number) 
5: Compute the correlation  The F6 Key: Row 1, Column 6 (OK) second line 


    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

 RPN mode: The One Key: Row 9, Column 2 The Zero Key: Row 10, Column 2 The Enter Key: Row 10, Column 5 The Six Key: Row 8, Column 4 The Bent Left Key: Row 8, Column 1 The Symb Key: Row 4, Column 4 (MATH) The Seven Key: Row 7, Column 2 (Probability) The Enter Key: Row 10, Column 5 The Enter Key: Row 10, Column 5 (1: COMB)

ALG mode: Press The Bent Left Key: Row 8, Column 1 The Symb Key: Row 4, Column 4 (MATH mode) The Seven Key: Row 7, Column 2 (Probability) The Enter Key: Row 10, Column 5 The Enter Key: Row 10, Column 5 (1: COMB) The One Key: Row 9, Column 2 The Zero Key: Row 10, Column 2 The Orange Arrow Key: Row 9, Column 1 The S P C (space) Key: Row 10, Column 4 (comma)The Six Key: Row 8, Column 4 The Enter Key: Row 10, Column 5
2: Compute 9P5  RPN mode: The Nine Key: Row 7, Column 4 The Enter Key: Row 10, Column 5 The Five Key: Row 8, Column 3 The Bent Left Key: Row 8, Column 1 The Symb Key: Row 4, Column 4 (MATH) The Seven Key: Row 7, Column 2 (Probability) The Enter Key: Row 10, Column 5 The Two Key: Row 9, Column 3 (2: PERM) The Enter Key: Row 10, Column 5

ALG mode: Press The Bent Left Key: Row 8, Column 1 The Symb Key: Row 4, Column 4 (MATH mode) The Seven Key: Row 7, Column 2 (Probability) The Enter Key: Row 10, Column 5 The Two Key: Row 9, Column 3 The Enter Key: Row 10, Column 5 (2: PERM) The Nine Key: Row 7, Column 4 The Orange Arrow Key: Row 9, Column 1 The S P C (space) Key: Row 10, Column 4 (comma) The Five Key: Row 8, Column 3 The Enter Key: Row 10, Column 5


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

Other Hp50g Pages:

HP's online manual*  sample problem set home page
Normal Probabilities Confidence Intervals Hypothesis Tests

* Technically, this is the manual for the 49g+, but the commands are the same for both calculators.

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