How to use standard deviation on a casio fx-115es plus

Z-score=(X-mu)/(sigma_d)
(X-value - mean value)/(standard deviation)

Follow the instructions beginning on page E-44 of the fx-115ES manual: http://support.casio.com/pdf/004/fx-115ES_991ES_E.pdf

Follow the instructions under "Statistical Calculations" beginning on page E-44 of the manual. Examples 053 through 059 in the Appendix show an example (especially 057).

You may download the manual and the appendix from http://support.casio.com/manualfile.php?rgn=1&cid=004001004

Follow the instructions beginning on page E-30 of this manual.

Use the STAT Editor. Refer to the "Statistical Calculation" section beginning on page E-44 of the manual. If you need a manual, you may download one here.

Here are the capabilities of the Casio calculators.
The screen captures may not look like ones taken from the FX-7400G
plus display but the instructions are accurate.
In stat enter the values in List1 and the frequencies in List2 (if doing paired variable statistics)
Press the key corresponding to the CALC tab



Press the 1-var tab and you get the results as seen on the screen with title 1-variable.
Other screens show some two-variable stats or regressions.


Use you knowledge of sample standard deviations and
population standard deviation to select which is relevant to your case.
They are given by xsigma-n and xSigma n-1

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.

Hello,
Press [S<->D] key to toggle between display formats.
Hope it helps.

I took statistics last semester and I don't really remember how, but after you enter your data, you press SHIFT, then STAT (on the 1 key), then I think it's under 5 (VAR), and maybe Xon-1? Eh, funny how long you remember this stuff for....

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 =