How to calculate mean

Quite simple with your PORPO calculator, you might wanna first press the reset button which is usually at the back of the calculator with a small pin or pen, then you're set to go.

(1) Press the "MODE + 2"
This brings you to the standard deviation mode on the calculator

(2) To input the numbers you wish to work on, say (1,2,3,4,5)
Press "1" then press "DATA" button, this will display "n=1" meaning you have imputed 1;
Subsequently, press "2" and hit "DATA" again meaning you've imputed 2;
Repeat this cycle till you've imputed 1,2,3,4,5 successfully

(3) Now hit "SHIFT + 2" or "SHIFT + 3" (as the case may apply) for standard deviation

(4) Could also find mean, summation etc by hitting "Shift + (whichever number is applicable as shown on the calculator button)"

This is to be expected. A standard deviation of 0 means that all the data points are identical. Asking for the point below which .025 of the data lie is meaningless.

The normalcdf function takes three arguments: the z value, the mean, and the standard deviation. In the "standard" case the mean is 0 and the standard deviation is 1. Thus, try calculating
normalcdf(-.1923, 0, 1) .

You're right in that the calculator thinks you have 19 data points. You need to delete the nine unwanted rows. After pressing EDIT, press NXT to bring up the second set of editing functions. Scroll down to each unwanted row and press B for -ROW to delete it.

Or else simply delete the Sigma-DAT variable in the current directory and start over.

Click on the Mode button twice until you see “SD”. Select 1. This puts the calculator in Statistics Mode. Enter the first number, 1.
Hit the M+. (n= 1 will appear in the window)
Enter the second number, 1.
Hit the M+ key. (n=2 will appear in the window)
. . . . .
Enter the last number, 7.
Hit the M+ key. (n=7 will appear in the window)
Hit shift, 2. (This invokes the S-Var option.)
Hit 1 for the sample mean. Hit Enter.
Hit 3 for the sample standard deviation that we will use in class. Hit Enter.

for the mean, just add them together and divide answer by the amount of figures you put in. as for the others, i'm not sure a standard scientific calculator will do that

standard deviation

calculate mean of a data set:

1. Turn calc. on or press MODE SeTUP
2.Press 3 for STAT
3. Press 1 for VAR
4.Enter values for X column
5. WHen done entering press SHIFT 1
6.Press 5
7.Press 2 to calculate the mean
8.Press =

Try this link if you haven't already, only found 33s myself but haven't had much time to look around the links.

http://www.shopping.hp.com/webapp/shopping/can.do?landing=calculator&category=Scientific&catLevel=1&storeName=storefronts

Mode - 2 - STAT - 1(VAR) Then put your data: 25,34,13

Then press AC which is the clear button and then SHIFT - 1(STAT) - 5(VAR) 2 (X) =

Voila!

1 - .93 = .07/2 = .035