What is mean, median, mode

nahrafsfa
Mon, 19 Dec 2005 02:07:55 +0000

basically…find the mean… then subtract every value from the mean and square it…then add up all the squares together and divide them by the number of units minus 1

i.e.

you have values A B C D E F G H I J K and say the mean is 4

now you take (A-4)^2, (B-4)^2, (C-4)^2…do that with all of them

now add up all of those together so (A-4)^2 + (B-4)^2 + (C-4)^2…

NOW we’ll call that sum X

SOOO between A-K you have 11 units

soooo you have to take the sum of the squares and divide them by the number of units - 1

SOOO it’ll be X/(11-1) = X/10

then you just take the square root of that value…and that’s your standard deviation