TI-89 / TI-92 Plus / Voyage™ 200 PLT Statistics with List Editor App … List Menu 63
stdDev(
Description
… (
List) Æ 3:Math Æ 7:stdDev(
stdDev( returns a VALUE containing the standard deviation of the elements in LIST1.
stdDev(LIST1) ⇒ VALUE
The statistics functions stdDev( and stDevPop( calculate the standard deviation of a
population differently.
StdDev( divides by n-1, and stDevPop( divides by n.
Note: LIST1 must have at least two elements.
Example
Setup:
list1={1,2,3,4,5,6}
1. Highlight the first cell of a list (list2) where you want to return the standard
deviation.
2. Press … (List) and select 3:Math. Then select 7:stdDev. The stdDev( function is
displayed in the entry line. Enter the list (
list1) for which you want to display the
standard deviation of the elements.
Tip: You can press 2 °, highlight a list,
and then press ¸ to paste the list name into
the list editor. Be sure to close arguments with a
right parenthesis (d).
You can also press … (List) and select 1:Names
to display the VAR-LINK [All] menu.
3. Press ¸ to calculate and display the standard deviation.
Note:
To generate a decimal approximation press
¥ ¸ for step 3. To generate a decimal
approximation for a single-element value, move
the cursor to the fraction for which you want the
approximate decimal, press ¸ to highlight it
on the entry line, and then press ¥ ¸.
You can also set the calculator to
APPROXIMATE mode. (Press 3 „ and then
set Exact/Approx to APPROXIMATE.)
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