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How to Find Standard Deviation on the TI–84

This gncHow educates you how to find standard deviation for listing of numbers on a TI-84 graphing calculator. You can utilize the standard deviation to learn just how much your data varies from the mean (standard).

This gncHow educates you how to find standard deviation for listing of numbers on a TI-84 graphing calculator. You can utilize the standard deviation to learn just how much your data varies from the mean (standard). After entering your data, you can make use of the 1-var-stats alternative to calculate numerous stats, consisting of the mean, sum, as well as both sample as well as populace standard deviations in one step.

Press the STAT switch on your calculator. It’s in the third column of secrets.


Select the Edit menu as well as press ↵ Get in. It’s the first option on the menu. You will see columns (checklists) labeled L1 with L6.

Note: The TI-84 allows you to get in as much as 6 various lists of data sets.


Clear existing information from the listings. If there’s already data in any of the columns, use these steps to remove it before you proceed:

  • Use the arrow keys to navigate to L1 (the first column).
  • Press  Clear.
  • Press  Enter.
  • Repeat for other lists with data.


Enter your data established into the L1 column. Press the ↵ Enter key after each value.


Press the STAT button to return to the menu.


Press the right-arrow to change to the CALC tab. It’s the second menu tab at the top of the display.


Select 1-Var Stats and press ↵ Get in.


Press the 2ND switch and afterwards 1 to choose L1. You’ll just require to do this if you have a T1-84 Plus version and do not already see “L1” beside “Note.”.
Some non-plus models may miss this display as well as show your results automatically.
Tip: If you developed numerous checklists and also want to pick a various one, press the number that refers that column. For instance, if you want standard deviation for the values you entered in L4, press the 2ND and then 4.


Select Calculate and also push ↵ Get in. The TI-84 will certainly now present standard deviation computations for the collection of values.


Discover the standard deviation value beside Sx or σx. These must be the 4th and also fifth results in the listing. You may need to scroll down to check out both worths.

  • Sx shows the standard deviation for a sample, while σx shows the standard deviation for a population. The value you’ll use depends on whether you used data from a sample or a full population.
  • A lower standard deviation value means that the values in your list don’t vary much from the mean, while a higher value means your data is more spread out.
  •  represents the mean, or average, of the values.
  • Σx represents the sum of all values.
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