http://www.mathsisfun.com/probability/standard-deviation.html

Here’s an online Standard Deviation Calculator:

http://www.mathsisfun.com/probability/standard-deviation-calculator.html

This site has the *best* explanation

for standard deviation on the TI-84!

http://mathbits.com/MathBits/TISection/Statistics2/standardDSpread.htm

http://mathbits.com/MathBits/TISection/Openpage.htm

Here’s a few more sites that explain how to do standard deviation on your TI-84. I believe the keystrokes for the 83 & 84 are the same.

http://www.stat.ufl.edu/~mmeece/2023/Calculator.htm

http://www.geocities.com/calculatorhelp/ti83.htm

http://www.saintmarys.edu/~cpeltier/calcforstat/StatTI-83.html

Good luck in your studies,

~ Mitch ~