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How to calculate the Linear correlation coefficient

What keys do you use to calculate the Linear correlation coefficient??

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  • Anonymous May 01, 2008




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Go to [2nd] [0] then select [diagnosticon] and click [ENTER] then it atomatically adds it to the LinReg(ax+b)

Posted on Jan 21, 2008


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Correlation coefficients

To get the correlation coefficient, open the CATALOG by pressing [2nd] 0 (CATALOG)
Press the [x-1] key for the letter D
Scroll down from the cursor position to reach DiagnosticsON.
Highlight the command and press EXE.

Use the statistic utility
Press the STAT key.
Press 5 to execute the SetUpEditor command
Press the STAT key again then 1:Edit
Enter an x-values in list L1, and the corresponding y-values in list L2. This way if your data set is not sorted in x, you can use the SortA( command.
After you enter the x- and y-values, exit the Editor
Press the STAT key then scroll once to CALC
Select 2:2-var Stats.
The command will echo on the main screen. Press EXE to execute it.
If there are no errors you statistics will be diplayed. Among them you will see R^2.

Sep 21, 2013 | Texas Instruments TI-84 Plus Silver...

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How to solve r in linear regretion

Find the formula for the correlation coefficient and use the calculator to calculate it.
You can also use the calculator to do statistics. It has some keys to retrieve the statistical values calculated. You will find r among them.
Please do read your manual to learn how to do statistics.

Dec 19, 2012 | Casio FX82ES Scientific Calculator

1 Answer

How do you do turn on diagnostics with a casio fx-9750g plus?

You don't do anything for the Casios.. If the correlation and determination coefficients have a meaning in the regression model (such as linear regression) they will be calculated and displayed automatically on the same screen where the regression equation is displayed. However if the regression model has no such coefficients nothing will be displayed.

May 02, 2012 | Casio FX-9750GPlus Calculator

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My r correlation doesn't show when I'm in linear regression?

You must turn the Diagnostics ON. Open the CATALOG of commands by pressing [2nd[0]. Press the key that has Letter D next to it. From that point in the catalog, scrool Down to get to DiagnosticsON. Highlight the command and press Enter. The calculator will echo the command in the Main screen. Press ENTER.
From now on the coefficient of determination ( the square of R) will be displayed along with other statistics.

Feb 03, 2012 | Texas Instruments TI-84 Plus Calculator

1 Answer

Am trying to calculate corelation on a Casio fx-9750GII,

Press Menu.
Use arrows to highlight STAT icon and press EXE.
Enter your data in two lists (x-values in L1, Y-values in L2)
Press F2 to activate the CALC Tab at the bottom of screen.

This is what you see.

Press F3 to activate the REGression tab.
This is what you will see: the TABs at the bottom of screen.
Each tab corresponds to a regression model: X-linear, X2 quadratic, etc.
If you press F3:X^2, you get the following
You see the parameters of the regression equation, the coefficient of determination r^2, and the Mean Square error. No correlation coefficient is defined for this regression model.
For other models like linear, logarithmic, power and exponential regressions, the correlation coefficient is defined and is thus displayed with the regression equation. It is the r-value.


Jul 31, 2011 | Casio FX-9750GPlus Calculator

1 Answer

So i Stat Plot to get a to get a linear regression graph, but it does not tell me the correlation coefficient. How do I get that to show up?

If the OS of calculator has been upgraded to version 2.53 MP, press [MODE] to open the configuration screen of calculator and scroll down to get the second page. Use down arrow to highlight the ON on line STATDIAGNOSTICS: Off ON

See screen capture:
If you did not upgrade to the OS version 2.53MP, then you can access the catalog of commands to execute the DiagnosticsOn command.
Press [2nd][0] to open catalog.
Press [X^-1] to jump to the first command that starts with D.
Scroll down till you reach DiagnosticOn. Press [ENTER] to execute command.
From now on, unless you change settings, the Correlation coefficient will be displayed along with the equation of best fit.

Sep 10, 2010 | Texas Instruments TI-84 Plus Silver...

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I have to do a correlation (r) with the Ti 84+ calculator and it doesn't work. Can you please explain.

The correlation factors R and R^2 are not defined for all regression models. Some models(such as the linear regression model) have a correlation coefficient, others do not. It means nothing to those models and is thus NOT DEFINED.

If you want some additional information on how to calculate the best fitting curve for a set of data, I suggest you read one or the other of two post of mine. Here are the links.

Apr 15, 2010 | Texas Instruments TI-84 Plus Calculator

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How to calculate the coefficient of linear correlation using casio cfx-9850 Ga plus

Although the coefficient of correlation is well defined for a few regression models, you do not calculate it directly because your calculator does that for you.
I could just tell you that it is displayed along with the statistical results (equation of best fitting curve, ) but if you do not know how to do that you will just shoot my post. If you know how to do a linear regression, stop right here and ignore what follows.

For those interested: How to do a regression on the calculator
I am sorry but I will have to assume that you know how to enter the data through the [MENU][STAT].

  1. After you finish entering all the data
  2. Press [F1:Graph], select Gph1, Gph2, or Gph3.
  3. Once the graph of the experimental data is drawn, you will have access to the diverse regression models.
  4. Your choices are
  5. [X:Linear]
  6. [Med-Med],
  7. [Quadratic :X^2]
  8. [Cubic;X^3]
  9. [Quartic: X^4].
  10. Press [F6] to scroll right to access the others
  11. [Logarithmic:LOG],
  12. [Exponential :EXP],
  13. [Power :Pwr] and
  14. [Sinusoidal: Sin]
After you select a model and press [EXE], the screen displays the equation and its various coefficients, a correlation coefficient if it has meaning, etc.
On that same screen, you have a menu option [F6:Draw]. If you select it, the regression curve will be drawn on the same screen as your statistical graph. This allows you to judge if the fit is good. If it is not, you have the option to choose another model.
The other option [F5:Copy] allows you to save the regression equation in the Y1, Y2, etc. variables.

Jan 03, 2010 | Casio CFX 9850GA Plus Calculator

1 Answer

Correlation coefficient of sine regression?

The correlation coefficient does not have meaning (is not defined) for most regression models. Check you theory to make sure it exits for the sine regression.
An easy way to verify that, is to use the Command DiagnosticOn, accessible through the catalog [2nd][0] (CATALOG) . Press [X^-1] (D) to jump to first command that starts with D. Scroll down to DiagnosticOn, select it and press [ENTER]. Calculator replies Done.

Do your sine regression again. If the correlation coefficient has meaning for this type of regression, you will find it with the other statistical variables. You may have to scroll down the statistical variable list to verify the whole contents of the list.

Hope it helps.
Thank you for rating the solution.

Dec 13, 2009 | Texas Instruments TI-84 Plus Silver...

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