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991ES-Plus X-hat syntax error

(991ES-Plus) every time i am on stat mode, in A+bx, i enter the Xs and the Ys, when i want to get the X-hat or the Y-hat (the ones with the caret ^ ) i get syntax error

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  • 12 Answers

You can not get directly x^ or y^ directly ,,,,, just enter a number before x^,,,, just like 1x^

Posted on Jun 25, 2014

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Posted on Jan 02, 2017

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SOURCE: regression line

okay this is easy but i'm doing it without a calculator infront of me in the upper right side of the calculator there is a button VARS hit it then i think you go right to function then hit enter then hit enter again. BEST OF LUCK

Posted on Nov 08, 2008

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SOURCE: when i press the MODE button in my CASIO fx - 911ES

Just in case : Press [SHIFT][CLR] (9) [3: ALL] to reset the calculator and try [MODE] again.
If that does not work, your calculator may be defective or a fake (not the genuine article). If at all possible, return it to where you bought it and get a refund.
Here is a picture of the FX-115ES, its face looks like the 991ES. Hope I am mistaken.


Posted on Oct 18, 2009

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SOURCE: how can i calculate probability distributions

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(
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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SOURCE: in regression anyone know how

You want to solve the equation?
Like 1X+2Y=3
thank you

Posted on Oct 19, 2010

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SOURCE: I'm trying to enter this

Use the (-) key just to the right of the decimal point, not the - key. The latter is for subtraction.

Posted on Sep 07, 2011

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What does error syntax mean

You enter a command. It is like an English sentence with a syntax (correct structure). If the structure of the command is wrong, you have a syntax error. You could use a minus - sign, instead of a change sign (-) that constitutes a syntax error.

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You may be in a wrong MODE. But even in any computational mode you should be able to do simple operations.

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Is there a verify mode on the CASIO fx-991es plus calculator?

You should try to explore the calculator to find its capabilities. You can also read the manual. Everything is in it.
Press the Mode button, then the down arrow key. On the second page of the mode list you find 2:Verif

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Casio fx 991ms

On a fx-991MS? With many other models, including the fx-991ES, I'd say you have the calculator in binary mode but the 991MS doesn't have such a mode.

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1 Answer

Save equation fx 991es

In table Mode you can enter the formula for a function and generate a table of values. For a 991ES Plus you can enter two functions. However if you change MODE everything will be erased.
In EQN (equation) there is a certain number of built in formula types you can choose. You will be asked for the coefficients which will be used to solve the equation selected. However if you change MODE your lose what you entered. So basically you cannot save formulas to use as a memory aid (if that is what your intention is.) Sorry.

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Error codes xs;I,0001

syntax error due to your print command
{XS;I,0001,002C4100'} and not xs;I.....

Jun 10, 2013 | Toshiba TEC B-SX4 Thermal Label Printer

1 Answer

How to find roots of a polynomial using fx 115 ms

It depends on the degree of the polynomial.
If polynomial is od degree 2 or 3 you can use the EQN mode (the equation MODE) by pressing [MODE][5:EQN] to enter Equation mode then press [3] for quadratic polynomial or [4] for a cubic one.
You will then be prompted for the various coefficients. The canonical form of these polynomials is aX^2 plus bX plus c= 0, and aX^3 plus bX^2 plus cX plus d=0.

If polynomial is of degree higher than 3, or for a general non-linear equation you must use the Solve( feature. See example #017 on page 6 of the appendix to the manual.

Nov 28, 2010 | Casio FX-115ES Scientific Calculator

1 Answer


The post addresses several questions
  1. 1-Var statistics and standard variations
  2. 2-Var stats (calculating the statistical values)
  3. Regressions (linear or otherwise)
I assume you know the theory. I will show you the key strokes for 1-Var statistics and 2-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.

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.


To use the regression a+bx,
1. Select STAT mode : [MODE][3:STat] [ENTER][2:a+bx]
2. Fill the X and Y values in the template.
3. Press [SHIFT][STAT][7:Reg]
You have several options 1:A to get coefficient A, 2: B to get coefficient B, 3:r etc.

To access each one, you have to press [SHIFT][STAT][7:Reg] anew.

To access the various sums, you press [SHIFT]{STAT][4:Sum] and you can select Signa_x, Sigma_x^2, etc..

Jul 15, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How can i use the a+bx on a Casio FX-300ES to find the LSRL

It would not cost you much effort to spell out the LSRL abbreviation, and it makes things easier for the reader. I believe I finally guessed what you wanted, but I would not bet my life in it.

To use the regression a+bx,
1. Select STAT mode : [MODE][3:STat] [ENTER][2:a+bx]
2. Fill the X and Y values in the template.
3. Press [SHIFT][STAT][7:Reg]
You have several options 1:A to get coefficient A, 2: B to get coefficient B, 3:r etc.

To access each one, you have to press [SHIFT][STAT][7:Reg] anew.

To access the various sums, you press [SHIFT]{STAT][4:Sum] and you can select Signa_x, Sigma_x^2, etc..

Hope it helps.

Oct 18, 2009 | Casio fx-300ES Calculator

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