Standard Deviation formula
I forget and I'm lazy, during my LSIT prep we had a math teacher come in and show us how to let the calculator do the lifting for us. Automate and move on.
Google it, beats me trying to remember.
I can remember being in a group of near 400 test takers and hearing the phrase "2.6% of today's candidates may pass this test"
Hope that is a thing of the past.
:-O
look it up. Wikipedia has a good entry on it.
if you are using hp 33s, check the user manual. sd can be calculated easily
Sample, Not population, the square root of the sum of the squares, - the sum of the x's over N, all over n-1
It's nearly impossible to type it out.
Square Root of
Sum of (X's Squared) - Sum of (X's) squared
------------------ --------------------
1 N
-----------------------------------------------
n-1
When I took the test in the FS test in '08 the question asked was solved with the standard deviation function in the HP 33. Just look through the manual and learn the procedure should be okay.
