Question about Texas Instruments TI-30XA Calculator

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Median for statistics

How do you find the median on the TI-30XA?

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Re: median for statistics

The TI-30XA doesn't give the median of a sequence of entered values, just the mean, std dev, and other one variable stats

Posted on Dec 31, 2008

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When I type in stat, then edit, t fnd the mean and the median, which is which? Because there are about 9 different answers???

The mean of a distribution is represented as an x with a bar above it. (xbar). When you scroll along the statistics you will see the Median, Xmax, Xmin, Q1, Q3, n. All clearly identified. Maybe you should learn mor about the theory.

Nov 09, 2011 | Texas Instruments TI-84 Plus Calculator

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I can't seem to get my calculator into statistics mode. could you please explain it very clear. i must be mising something. i have a texas instrument calculator(Ti-30xA).thank you.

The TI-30Xa does not have a statistics mode. That statistics operations are available at all times, just like addition and subtraction. Just enter the data with Sigma-plus and then calculate the desired statistics---mean, standard deviation, and so forth.

Full details are in the "One-Variable Statistics" section of the guidebook (page 9 in my copy). If you need the guidebook, you can download one from

Jun 23, 2011 | Texas Instruments TI-30XA Calculator

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Hod do you put this calculator into statistical mode?

The 30XA doesn't have a statistical mode; all of the statistical functions are available at all times.

2nd [CSR] clears the statistical registers, Sigma+ adds a data point, Sigma- deletes a data point, 2nd [x-bar] gives the mean, 2nd [sigma-x-n] and 2nd [sigma-x-n-minus-one] give the population and sample standard deviation.

For full details, refer to the statistics section in the manual. If you don't have a manual, you can download a guidebook from

Jan 08, 2011 | Texas Instruments TI-30XA Calculator

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Can i do sigma notation on a ti-30xa calculator?

No. There are some keys on the TI-30XA that may make you think so, but they are statistical operations. For example, you can enter values using the Sigma+ key and the TI-30XA can give you the sum of the values entered, sum of the squares, mean value, standard deviation and so on.

You cannot do calculations like "Give me the sum of all integers from 1 to 100" with the TI-30XA, you'd need a far more sophisticated calculator.

Jan 06, 2011 | Texas Instruments TI-30XA Calculator

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How do you change the statistical mode on a TI-30XA?

The truth of the matter is that there is no statistical mode per se. You just start entering data in a specific sequence.
If there is data in the statistics register (remnant of and old calculation) you must start by clearing old values :[2nd][CSR].
Here is a screen capture with an example that uses frequencies.


Aug 14, 2010 | Texas Instruments TI-30XA Calculator

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I don;t undersdtand what x bar is

"x bar" returns the mean of a series of numbers entered in "statistical mode".

e.g.enter 3, then press the "sigma plus" key (just above the "STO" key. Display will show "n = 1" and "STAT" will display to remind you that you are in statistical mode.

Enter 3 the "sigma plus" and you will see "n = 2" to tell you that you have entered two numbers. Keep doing this for a few more, then press "2nd x bar" and you will see the mean of all the numbers you entered, which is 3 if you entered all 3's.

To exit "STAT" mode, you have to press "2nd" then "CSR" (just above the 7 key), since the regular "clear" key only clears the pending entry.

Lots of simple statistical stuff you can do on the TI-30XA, read the guide book, available online at TI if you don't have one

Dec 16, 2008 | Texas Instruments TI-30XA Calculator

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I dont know how to do regression lines on my TI-30XA

You can't, the TI-30XA is a one variable statistical calculator, so you can't do two variable statistics with it.

You need to step up to the TI-35X or the TI-30X IIS

Oct 02, 2008 | Texas Instruments TI-30XA Calculator

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Hi - You can download the manual by clicking the link underlined in blue below:


See page 10:


Please take a moment to rate this solution & let us know if the information given was useful to you - Good Luck!


Sep 10, 2008 | Texas Instruments TI-30XA Calculator

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Linear regression

I already answered a Q like this - you can't do 2 variable statistics on the TI-30XA, it only does one variable statistic.

To do 2 variable stat like linear regression, you need the TI-36X or TI-30X IIS, or comparable HP, casio etc

May 17, 2008 | Texas Instruments TI-30XA Calculator

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Difficulty changing to the Statistics mode

Download the small instruction book from TI web site, keystrokes and examples at pages 10/11

Mar 22, 2008 | Texas Instruments TI-30XA Calculator

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