Question about Texas Instruments TI-89 Calculator

1 Answer

Finding the mean of a list of variables - Texas Instruments TI-89 Calculator

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    One Above All:

    The expert with highest point at the last day of the past 12 weeks.

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.

  • Texas Instru... Master
  • 102,366 Answers

Use the mean() function in the MATH/Statistics menu to find the mean of a list. For example, mean({1,2,3,4,5}) will produce 3. Likewise, if the list {1,2,3,4,5} is stored in the variable z, mean(z) will also produce 3. You can also specify a second argument to mean() to specify a frequency list for groupd statistics.

For full details, refer to the "Statistics and Data Plots" chapter in the guidebook. If you've misplaced your guidebook, you can download a copy from

Posted on Aug 03, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have 50 data points for which i need to find standard deviation on a classpad 330 , is there any quicker way to calculate than minusing the mean from every data point?

Here is one technique I used on the TI84Plus.
Create two lists list1(50) and list2(50) of equal dimension (same length)
You will have to find how to do it on ClassPad.
Fill list2 with zeros
Fill list1 with your data.
Sort the list in ascending order (if it is not sorted)
Do standard deviation calculation on list1 (or calculate the average)
The mean of the data is in a special variable (xbar)
From the command line using the list syntax calculate abs(list1-xbar) and store results in list2, overwiting the zeros.
Perform standard deviation on the new list2. You will get the mean deviation from the mean in the variable xbar.

A simple request from you. Can you please not use MINUS as a verb? By doing so you are propagating incorrect usage. There is a short and correct way to express the operation: to add.

May 05, 2012 | Casio ClassPad 300 Calculator

1 Answer

Check engine light is lit and error code is identified as P1383 unidentified code


P1383 is one of Jaguar's own codes. You can find the code even in other engines (e.g. Ford). P1383 means : Variable Cam Timing Overretarded (Bank #1).

Symptoms:Rough idle, engine stalling.

Here possible causes:

  • Cam timing improperly set.
  • Continuous oil flow to the VCT piston chamber.
  • VCT solenoid valve stuck open.
  • Camshaft advance mechanism binding (VCT unit).

  • Solution: the part in the Variable Cam Timing listed above must be tested and repaired.



    Aug 09, 2011 | 2002 Jaguar S-Type

    1 Answer

    Err:dim mismatch what does this mean and why wont this stupid thing let me graph?!

    You're apparently referencing one more lists or matrices whose dimensions do not match. You may be referencing a variable that is a matrix when it should be a scalar.

    If you can't find it, append a comment to this post specifying exactly what you're trying to plot.

    Jul 01, 2010 | Texas Instruments TI-83 Plus Calculator

    1 Answer

    Standard deviation and mean are not correct

    Just add the values and divide the sum by the number of values.

    May 25, 2010 | Texas Instruments TI-Nspire Graphic...

    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...

    2 Answers

    When one of my students went to stat plot, they got an error archive message

    Press [2nd][MEM][2: Mem Mgmt/Del][1:All] and scroll down to see if a system variable or other entity that is needed for graphing may have been archived. A variable that is archived has an asterisk next to it on the left.
    To unarchive it press ENTER when the arrow reaches it.
    You may be able to draw your graphs. It you are unable, I suggest you reset the Ram: Press [2nd][MEM][7:Reset][1:All Ram][2:Reset] [ENTER]. Press [CLEAR] to erase the message and restart the statistics.

    Hope it helps.

    Nov 01, 2009 | Texas Instruments TI-83 Plus Calculator

    3 Answers

    Argument error whenever I type equations with variables.

    Perhaps you have some data stored in the x variable.

    With the calculator on, press [2nd] then the minus button. This brings up a list of all the saved data in the calculator. Look through the far left column of the list for x.

    If you find x in the list, highlight x, then press F1, and then select delete.

    Now it should work like normal.

    Oct 22, 2009 | Texas Instruments TI-89 Calculator

    1 Answer

    Error 23 stat

    Quoting from page B-7 of the Guidebook:

    You are attempting a stat calculation with lists that are not appropriate; for example, you are requesting a statistical analysis with fewer than two statistical data points. The frequency (y value) for a 1-VAR analysis must be an integer >= 0.

    If you simply want 1-variable statistics for two sets of data, you'll have to calculate them separately.

    Oct 20, 2009 | Texas Instruments TI-85 Calculator

    1 Answer

    Action script for windows


    I think you need a FOR - DO Scriptcode.

    FOR /f %%f IN (actual.txt) DO echo %%f >> list.txt

    "FOR" with Parameter "/F" means:
    read in "actual.txt" every line as text, then save it in variable "%%f" and "DO" an "ECHO" in variable "%%f" which will be written in ">>" "list.txt"
    Hope that helps.

    May 23, 2009 | Microsoft Windows Vista Home Premium with...

    1 Answer

    Where can I find GM Diagnostic Codes for the OBD?

    go to auto zone and you can buy a haynes book for your car with the codes in the book, or buy a code scanner book.

    Jan 03, 2009 | 1993 Buick Riviera

    Not finding what you are looking for?
    Texas Instruments TI-89 Calculator Logo

    Related Topics:

    251 people viewed this question

    Ask a Question

    Usually answered in minutes!

    Top Texas Instruments Office Equipment & Supplies Experts


    Level 3 Expert

    8073 Answers

    Stevan Milanovic

    Level 2 Expert

    267 Answers

    Donald DCruz
    Donald DCruz

    Level 3 Expert

    17130 Answers

    Are you a Texas Instruments Office Equipment and Supply Expert? Answer questions, earn points and help others

    Answer questions

    Manuals & User Guides