Hello,

I am calculating the Standard Deviation on this calculator fine as below:

Set the [Mode] to [3:STAT]. You are offered the choices

1:1-Var

2:A+BX

3:__+cX^2

etc.

I**f you want to do 1-Var statistics**,
you press 1:1-Var. A column template opens where you put the X values.
If a value is repeated you enter it several times. (there is no
frequency column.)

When you enter all data you press [SHIFT][STAT]

You have several choices among them

4: SUM to get SigmaX^2 and Sigma X

5: VAR to get n, the mean X bar, the sample and population standard deviations

6:MINIMAX to get MinX and MaxX

7: Distr the Distributions.

However I want to find the variance. How can I easily do this?

Having calculated the Standard Deviation. I cannot see a way of taking the square of the Standard Deviation other than writing it down and typing it back in.

I have tried the square function and saving the SD to memory with no success. I wonder if I am just missing the obvious here.

This question could be phrased as having got an answer through the Stat mode described above how can I then perform another action on that answer?

Grateful for any advice.

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Hello,

I am happy that you found my solution helpful and even flattered that you copied it in this thread. By doing this, you gave me the opportunity to discover an error in my post. In fact, the calculator does provide a column for the frequency. If you enter nothing in the frequency column, all data items will have their frequency set to 1, by default.

Back to the current subject: How to get the variance (the square of the standard deviation).

When you finish entering your data:

- Press the [AC] button to exit the data editor.
- Press [****][STAT].
- Press [5:Var] to open the statistical result selection screen.
- Press [3: xSigma_n] or [4:xSigma_n -1] depending on what you are interested in (population or sample) standard deviation.
- The screen echoes the symbol for the value selected (the value displayed on the bottom line may be 0 or an old value from a previous calculation: it is not the value you have just calculated).
- Press [=] to display the current value of the SD chosen.
- By doing this you are in fact storing it it answer memory.
- All you have to do now is to raise it to power 2 by pressing the [x^2] key ( the one above the [HYP] key).
- The calculator will display Ans^2.
- Press [=] to display the value of the variance.

While the symbol xSigma_n or xSigma_n-1 is still displayed with the blinking cursor to its right, press the [x^2] key above the [HYP] key. The screen displays say xSigma_n ^2. Press [=] to calculate the variance.

As my motto says, I am always happy to help, but happier still when people show true appreciation.

Hope it helps.

Posted on Dec 12, 2009

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Posted on Jan 24, 2010

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Posted on Jan 02, 2017

Z-score=(X-mu)/(sigma_d)

**(X-value - mean value)/(standard deviation)**

Apr 30, 2015 | Casio fx-115ES Plus Scientific Calculator

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

Jun 15, 2013 | Casio FX-115ES Scientific Calculator

Calculate the population standard deviation and then square it.

Statistical calculations begin on page E-22 of the manual.

Statistical calculations begin on page E-22 of the manual.

Mar 15, 2012 | Casio FX570ES Scientific Calculator

Full instructions are in the "Statistical Calculation" section beginning on page E-44 of the manual. If you need a manual, you may download a copy here.

In short, you go into the STAT mode, bring up the STAT Editor screen, enter the 50 data points, then calculate the mean and standard deviation.

In short, you go into the STAT mode, bring up the STAT Editor screen, enter the 50 data points, then calculate the mean and standard deviation.

Oct 13, 2011 | Casio FX-115ES Scientific Calculator

- Calculator must be in SD mode (standard deviation mode) :Press [MODE] [.]
- However, if [FIX] or [SCI] appears on display you must press [MODE][9] first.
- Data input always starts with [SHIFT][SAC], to clear the registers of old data.
- Type a number and press the [DATA] key, it is the [M+] key at the bottom right of keypad.

Press [SHIFT] [9] (sigma n-1) to get sample standard deviation

Press [SHIFT][8] (sigma n] for the population standard deviation

Press [SHIFT] [7] (xbar) for the mean

Press [SHIFT] [6] (n) for the number of data entries

Press [SHIFT] [5] (capital sigma x) for the sum of values

Press [SHIFT] [4] (capital sigma x to y) for the sum of squares of the values

For additional information you might consider taking a look at the calculator manual

Apr 27, 2010 | Casio FX-260 Calculator

- Calculator must be in SD mode (standard deviation mode) :Press [MODE] [.]
- However, if [FIX] or [SCI] appears on display you must press [MODE][9] first.
- Data input always starts with [SHIFT][SAC], to clear the registers of old data.
- Type a number and press the [DATA] key, it is the [M+] key at the bottom right of keypad.

Press [SHIFT] [9] (sigma n-1) to get sample standard deviation

Press [SHIFT][8] (sigma n] for the population standard deviation

Press [SHIFT] [7] (xbar) for the mean

Press [SHIFT] [6] (n) for the number of data entries

Press [SHIFT] [5] (capital sigma x) for the sum of values

Press [SHIFT] [4] (capital sigma x to y) for the sum of squares of the values

For additional information you might consider taking a look at the calculator manual.

Jan 26, 2010 | Casio FX-260 Calculator

Hello,

Press [S<->D] key to toggle between display formats.

Hope it helps.

Press [S<->D] key to toggle between display formats.

Hope it helps.

Oct 26, 2009 | Casio FX-115ES Scientific Calculator

http://www.geocities.com/calculatorhelp/casiofx300ms.htm

Mar 11, 2009 | Casio FX-300MS Calculator

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 =

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 =

Oct 05, 2008 | Casio FX-115ES Scientific Calculator

This calc will do standard deviations. In the manual it is on page 2 and also on page 40.

Sep 07, 2006 | Casio FX-7400G Plus Calculator

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