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Performing a standard deviation calulation using Casio fx-991ES

There is a STAT button where I can choose VAR, then I can choose the population SD formula: ymeansymboln-1.....what do I do now to perform the calculation? The manual that came with is no help...it shows me how to get that formula on the screen...but not what to do with it from there.

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Posted on Jan 02, 2017

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SOURCE: Calculate Variance on Casio FX-83ES Calculator

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:

  1. Press the [AC] button to exit the data editor.
  2. Press [****][STAT].
  3. Press [5:Var] to open the statistical result selection screen.
  4. Press [3: xSigma_n] or [4:xSigma_n -1] depending on what you are interested in (population or sample) standard deviation.
  5. 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).
  6. Press [=] to display the current value of the SD chosen.
  7. By doing this you are in fact storing it it answer memory.
  8. 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).
  9. The calculator will display Ans^2.
  10. Press [=] to display the value of the variance.
If you are not interested in the value of the standard deviation, but just want the variance, follow the foregoing procedure until step #5.
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

  • 102366 Answers

SOURCE: does this calculator comes with a standard

Yes. The sample standard deviation is 2nd [sigma x n-1] and the population standard deviation is 2nd [sigma x n].

Posted on Apr 02, 2010

  • 7 Answers

SOURCE: Trying to find standard deviation on the calculator

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....

Posted on May 03, 2009

  • 7993 Answers

SOURCE: how can i calculate probability distributions

Hello,
Not knowing what kind of probability calculations you want to perform, I can only show you how to access the distributions that this calculator has to offer.
After you enter your data and do the usual statistics, you press SHIFT STAT and select 7:Distr. You get acces to
1: P(
2:Q(
3:R( and
4: X to t, the variate.

See the exemples in the Appendix to the user's manual, in particular #059.

Hope it helps.

Posted on Oct 28, 2009

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1 Answer

Hi i want to calculate regression in casio fx-3600pv???please help me


Here is what I gather from the picture of the faceplate.
You choose the standard deviation mode (SD) by pressing MODE 3.
You might have to choose 1-Var or 2-Var. (not sure, but 1-var for sure)
You enter a data item followed by the DATA (RUN) key. Keep entering data and pressing RUN.
While in SD MODE, if you press the 1 key you get the avregae xbar, if ****** you get the sum of squares of the entered data. Looking at the digit keys, They all have statistical markings: (A, B, and r) are for regression analysis, (7,8, 9). 2 has the population standard deviation sigma n x, 3 the sample SD, etc. That should get started. And please, experiment. There are not many variations, on th statistical theme on scientific calculators.
Hope it helps.

Nov 12, 2011 | Office Equipment & Supplies

1 Answer

How do i calculate the standard deviation


for 1-Var statistics
Press [MODE][3:STAT] [1:1-VAR]. You are ready to enter values in the X column.
Enter a number and press [=]. Cursor jumps to second number to enter.
Keep entering numbers and pressing [=] till all numbers are in. Press the [=] key after the last one.
Press [AC] key to clear the screen.
Press [SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1.
Press the number corresponding to Referable you want, ex 1:n . The variable appears on screen. Press [=] and it will be displayed.
To display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .

To access the sum of squares sigma x^2 and the sum of data sigma x press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x]. Press [SHIFT][STAT][6:MinMax] to access minX and maxX.

For 2-var statistics
To perform 2 variable statistics you press [MODE][3:STAT] and any of the other regression options (except 1:1-Var). A two column template opens where you enter the X and Y values. When finished entering data, press [SHIFT][STAT][5:Var]. to access the different statistics. you should be able to recognize what each variable means.

Oct 26, 2011 | Casio fx-300ES Calculator

1 Answer

How do I compute population standard deviation on the TI 84 plus?


Put the data into a list using whatever scheme you prefer. Press STAT right-arrow to bring up the STAT CALC menu. Select "1-Var Stats" and specify the list containing the data. You'll get a screen showing the various statistical values. The population standard deviation is designated by a lowercase sigma.

Jun 01, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

HOW TO SOLVE STANDARD DEVIATION PROBLEMS


Here it is.

TO COMPUTE STANDARD DEVIATION AND 2-VAR STATISTICS.

I assume you know the theory. I will show you the key strokes

for 1-Var statistics
Press [MODE][3:STAT] [1:1-VAR]. You are ready to enter values in the X column.
Enter a number and press [=]. Cursor jumps to second number to enter.
Keep entering numbers and pressing [=] till all numbers are in. Press the [=] key after the last one.
Press [AC] key to clear the screen.
Press [SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1.
Press the number corresponding to Referable you want, ex 1:n . The variable appears on screen. Press [=] and it will be displayed.
To display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .

To access the sum of squares sigma x^2 and the sum of data sigma x press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x]. Press [SHIFT][STAT][6:MinMax] to access minX and maxX.

For 2-var statistics
To perform 2 variable statistics you press [MODE][3:STAT] and any of the other regression options (except 1:1-Var). A two column template opens where you enter the X and Y values. When finished entering data, press [SHIFT][STAT][5:Var]. to access the different statistics. As I assumed above, you should be able to recognize what each variable means.

Feb 02, 2011 | Casio fx-300ES Calculator

1 Answer

I'm using the TI-30X IIS calculalator and cannot calculate the standard deviation. Please help! Thank you!


Press 2nd [STAT] then select CLRDATA to clear statistics data. Select 1-VAR or 2-VAR for one-variable or two-variable statistics. Press DATA and enter your data (x for 1-VAR or x and y for 2-VAR). Press 2nd [EXIT-STAT] and select N. Press STAT-VAR to see a menu of statistics variables and their values. Sx (and Sy) will give you the standard deviation, sigma-x (and sigma-y) will give you the population standard deviation.

Dec 14, 2010 | Texas Instruments TI-30 XIIS Calculator

1 Answer

How to i do std deviation and sample mean


Example: Enter the following x variables, and determine the sample and population standard deviations.
x = {1,2,3}
  • Press [DATA] and begin to enter the data as indicated into the L1, L2 or L3 lists. To input a data point, type the value and press [ENTER]. Press the down arrow key to move on to the next data point.
  • Press [2nd], [STAT], and then choose 1-VAR.
  • For the "DATA" option, choose the listname the data is stored in (L1, L2 or L3). For the "FRQ" option, choose "ONE" since this data does not include a frequency list.
  • Arrow down to "CALC" and press [ENTER].

    Answers should be as follows:
    3:Sx (Sample Standard Deviation) = 1
    4:sx (Population Standard Deviation) = 0.816497
  • Press [2nd] [MODE] to exit STAT mode.

Oct 20, 2010 | Texas Instruments TI30XS Scientific...

1 Answer

Standard deviation


Here it is.

TO COMPUTE STANDARD DEVIATION AND 2-VAR STATISTICS.

I assume you know the theory. I will show you the key strokes

for 1-Var statistics
Press [MODE][3:STAT] [1:1-VAR]. You are ready to enter values in the X column.
Enter a number and press [=]. Cursor jumps to second number to enter.
Keep entering numbers and pressing [=] till all numbers are in. Press the [=] key after the last one.
Press [AC] key to clear the screen.
Press [SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1.
Press the number corresponding to Referable you want, ex 1:n . The variable appears on screen. Press [=] and it will be displayed.
To display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .

To access the sum of squares sigma x^2 and the sum of data sigma x press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x]. Press [SHIFT][STAT][6:MinMax] to access minX and maxX.

For 2-var statistics
To perform 2 variable statistics you press [MODE][3:STAT] and any of the other regression options (except 1:1-Var). A two column template opens where you enter the X and Y values. When finished entering data, press [SHIFT][STAT][5:Var]. to access the different statistics. As I assumed above, you should be able to recognize what each variable means.

Oct 07, 2010 | Casio fx-300ES Calculator

1 Answer

How to calculate standard deviation


TO COMPUTE STANDARD DEVIATION AND 2-VAR STATISTICS.

I assume you know the theory. I will show you the key strokes

for 1-Var statistics
Press [MODE][3:STAT] [1:1-VAR]. You are ready to enter values in the X column.
Enter a number and press [=]. Cursor jumps to second number to enter.
Keep entering numbers and pressing [=] till all numbers are in. Press the [=] key after the last one.
Press [AC] key to clear the screen.
Press [SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1.
Press the number corresponding to the statistical value you want, ex 1:n . The variable appears on screen. Press [=] and it will be displayed.
To display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .

To access the sum of squares sigma x^2 and the sum of data sigma x press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x]. Press [SHIFT][STAT][6:MinMax] to access minX and maxX.

For 2-var statistics
To perform 2 variable statistics you press [MODE][3:STAT] and any of the other regression options (except 1:1-Var). A two column template opens where you enter the X and Y values. When finished entering data, press [SHIFT][STAT][5:Var]. to access the different statistics. As I assumed above, you should be able to recognize what each variable means.

Aug 27, 2010 | Casio FX-115ES Scientific Calculator

2 Answers

Calculate Variance on Casio FX-83ES Calculator


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:
  1. Press the [AC] button to exit the data editor.
  2. Press [****][STAT].
  3. Press [5:Var] to open the statistical result selection screen.
  4. Press [3: xSigma_n] or [4:xSigma_n -1] depending on what you are interested in (population or sample) standard deviation.
  5. 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).
  6. Press [=] to display the current value of the SD chosen.
  7. By doing this you are in fact storing it it answer memory.
  8. 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).
  9. The calculator will display Ans^2.
  10. Press [=] to display the value of the variance.
If you are not interested in the value of the standard deviation, but just want the variance, follow the foregoing procedure until step #5.
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.

Dec 11, 2009 | Casio fx-300ES Calculator

1 Answer

How do i find the variance if i'm given the x


Hello,
Set the [Mode] to [3:STAT]. You are offered the choices
1:1-Var
2:A+BX
3:__+cX^2
etc.
If 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.

If you want to perform 2-Var statistics
You press [MODE][STAT] and select one of the Regression models
2:A+BX
3:__+cX^2
etc.
The selection of any of the 7 regression models, opens a two-column template where you enter the X and Y values
When finished press [SHIFT][STAT]
The choices offered are
  1. Type takes you back to select type of statistics to perform
  2. Data To edit the data in the columns
  3. Edit To insert or delete a value
  4. SUM To access the calculated values of SigX^2,SigX,SigY^2,SigY,SigXY,SigX^3, SigX^2Y, SigX^4
  5. Var : To access the calculated values n, Xbar, Sample STD for x, S STD for Y, Pop STD for X, and Pop STD for Y
  6. MinMax : MinX, MinY, MaxX, MaxY
  7. Reg: Gives you the regression coefficients for the particular regression model you want to test.
The mean is represented by X bar.
The variance is the SQUARE of the Standard Deviation.
Hope it helps.

Nov 06, 2009 | Casio fx-300ES Calculator

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