The mean (mu) is calculated by:
The standard deviation obeys a rule saying
I wasnt sure where to post this question but since it`s stats, i decided to post it here.
p(x)=(1/4)(3/4)^(x-1), X=1,2,3,4
I'm totally confused on how to do it...the question and answer is in the word.doc provided but i need an explanation on how the answer is created.
Thank you.