Question about Texas Instruments TI-30XA Calculator

# I have 55,50, 45, 42 as numbers then I hit the E key then 2nd then the oxn-1 key and get 5.71 is this correct ?

Posted by on

• 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.

Superstar:

An expert that gotÂ 20 achievements.

• Texas Instru... Master

That is the correct value for the sample standard deviation for this data set. Well, personally I'd round the third digit up to get 5.72.

Posted on Oct 15, 2010

Testimonial: "Thanks I thought I had the wrong keys."

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

×

my-video-file.mp4

×

## Related Questions:

### Dividing a number by Avogadro's number. It is not working. Do I need to change some setting?

Nothing of the sort. Just locate the EE key. You access it by pressing [2nd][x^-1]. It is the one below the [sin] function key.
Key in
6.02 [2nd][x^-1] 23 [=/Enter]
If you divide by that number just enclose it between parentheses to ensure correct calculation.
You can also enter it as described 4 lines above, press the = key. The number will be displayed. To divide by it, press the [x^-1] key and its reciprocal will be displayed ready to be multiplied.

Oct 30, 2013 | Texas Instruments TI 30XIIS Scientific...

### How do i do radicals expressions on a TI 30XA

On your calculator, in the 4th column and third row down you should see the root x symbol. In order to do a radical, just press a number and then press the root x and you shall get the square root of your number. Now in order to do this for cubed root, fourth root, etc, you have to hit the number you want to put in the radical, the 2nd key, look for the y^x key in the last column second row, and then the number outside the radical. For example, if you wanted to do the cubed root of 8, you would hit 8, 2nd y^x, 3, and you should get 2.

May 05, 2011 | Texas Instruments TI-30XA Calculator

### How do I find the standard deviation?

Hello,
Here is a detailed exemple. Hope it helps.

Some comments on the various variables (should the information be needed. If not need, please skip it.)

1.All you have to do is follow the instructions key stroke for key stoke, but enter your own data.
2. If a number is repeated 3 times like the number 55, you can enter it 3 times or use the shortcut in the exemple
55 [2nd][FREQ]3 [Sigma+].
3.If you make a mistake and enter the wrong number, use the [Sigma-] key to remove it. That is similar to what a cashier does when an item is entered twice: it is entered a third time but with minus sign.
4. Every time an item is entered, the display shows the total number of items so far. When it is finished the cashier press the key that sums up the prices to get the total. This is the role of the [2nd][Sigma X] key combination.
5. The average number of the data is obtained by the [2nd][x bar] combination. The last two key combinations display the two type of deviations.

Check the theory you have been taught and try again. If that is not the type of statistics you were supposed to do, then give more information.

Oct 28, 2009 | Texas Instruments TI-30XA Calculator

### 2nd shift key on logitech keyboard (corded) no longer works

YOU HAVE TO GO INTO KEYBOARD AND FIND THE SETTINGS FOR KEYS IN CONTROL PANNEL . SET IT AS ENGLISH.

Feb 25, 2009 | Logitech Cordless Desktop EX110

### How do you enter negative numbers on a TI-30X iis calculater?

On the bottom of the calculator near the zero and the enter key it has the symbol (-) that is a negative number symbol

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

### Light/Dark Screen

Turn on the TI 83 enter 1234
1. press the <2nd> once; press and hold the <up-arrow> until you get the numbers as dark as you want. If you let up and press the arrow key again you have turned the function off. You must start over by pressing the <2nd> key then the <up-arrow> key and hold.

2. If the numbers are too dark; press <2nd> once and hold the <down-arrow> to get it corrected.

3. If this does not correct the light/dark screen condition you need to buy new batteries!

Hope you can follow my explination.

R. Meidell

Oct 15, 2008 | Texas Instruments TI-83 Plus Calculator

### Minutes

Yes. Use the following procedure to enter an angle in degrees-minutes-seconds form:

Enter the number of degrees. Press "2ND" "ANGLE" "1"
Enter the number of minutes. Press "2ND" "ANGLE" "2"
Enter the number of minutes. Press "ALPHA" " (double-quote above the +)

The ANGLE key is the APPS key.

Aug 19, 2008 | Texas Instruments TI-84 Plus Calculator

### Ti89 titanium

WHAT IS THE KEY OR KEYS TO GET THE INVERSE LOG FUNCTION?

Apr 02, 2008 | Texas Instruments TI-89 Calculator

### Standard deviation

Enter the first number, 1.
Hit the σ+ (Sigma+) key. ( n=1 will appear in the window)
Enter the second number, 1.
Hit the σ+ (Sigma+) key. (n=2 will appear in the window)
. . . . .
Enter the last number, 7.
Hit the σ+ (Sigma+) key. (n=7 will appear in the window)
Hit 2nd x2 (by hitting the 2nd key you are actually selecting the x-bar written above the key.) This gives you the mean.
Hit 2nd sqrt(x). This gives you the sample standard deviation which we will use in class.
Make sure you turn your calculator off and on for new data sets.

Jan 24, 2008 | Texas Instruments TI-30XA Calculator

### X and Y axis disappeared

If you are using the TI 89 titanium Go to your graph press f1 go do to last option (format) you can turn on your x and y axes there

Oct 31, 2007 | Texas Instruments TI-89 Calculator

## Open Questions:

#### Related Topics:

69 people viewed this question

Level 3 Expert

Level 2 Expert