Question about Texas Instruments TI-84 Plus Calculator

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I am not able to do some functions on my TI-84 Plus calculator, such as: coefficient correlations. I was told I may need to reset my calculator. How do I do that?

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To have the coefficient correlation show up when you calculate a regression, you must first turn diagnostics on.

The way to do this is press 2nd then zero. You are now in the catalog. Go to the d's in the alaphbetic list, highlight "diagnostic on" and press enter. You will be taken back to the home screen press enter and you get the word "done". The diagnostic is not on unless you get the word "done".

Now when you calculate a regression, the correlation coefficient will show up. It is designated as r = on the home screen.

Posted on Oct 04, 2009


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List 1 and list 2

If you are truly talking about the the TI89 calculator there is no command to set Diagnostics ON. This is a command for the TI 83/84 Plus. In the TI 89, the correlation coefficient is displayed by default in the statistical result screen.
In the Ti83/84 open the catalog: Press [2nd][0] (CATALOG).
Press D, then scroll from there until the line DiagnosticOn. Select the line and press ENTER.

Dec 09, 2013 | Texas Instruments TI-89 Calculator

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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...

1 Answer

How to turn on diagnostic on casio fx cg 10

You got yourself a prizm, learn to use it and forget about the TI84 Plus. The DiagnosticsON is a command of the TI8 84 plus. You can activate it for statistics or deactivate it. For the Casios, the determination coefficient or the correlation factors are always displayed. If the regression model you are using has a correlation coefficient it will be displayed on the same screen the statistical values are displayed.
Please read your manual, it will help you a lot.

Sep 25, 2012 | Casio Prizm Fx-cg-10-l-ih Graphing...

1 Answer

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

My calculator is not showing the correlation coefficient (r =)

Press [2nd][0] to access the CATALOG. Use down arrow to move down the catalog index. You should look for the Command DiagnosticsON. Highlight it and press [ENTER]. When you go back to perform statistical calculations the R and R^2 will be displayed on the same screen where you get the regression equation. (Note: This coefficient is not defined for all the types of regression models. For some it means something and for others it doesn't. If it has meaning for the model it will be displayed).

Sep 19, 2010 | Texas Instruments TI-84 Plus Calculator

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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

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...

1 Answer

What does pwrreg stand for , what kind of function is it?

It is a model of regression, namely power regression. The mathematical expression for it is y=a*b^(x) -----a times b to the power of x. On the calculator, the function returns a, b, and the correlation coefficient r.

Hope that helps.
Thank you for using FixYa.

Nov 25, 2009 | Texas Instruments TI-84 Plus Calculator

1 Answer

Correlation coefficient- how to compute

Turn your "diagnostic on" from the catalog menu

May 04, 2009 | Texas Instruments TI-84 Plus Calculator

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