Topic Review - Newest First (only newest 5 are displayed)

rqayyum

Re: variance

Are you asking why we divide standard deviation by sqrt(n) to get standard error?

ibrahim_ap

Re: Re: variance

THE FORMULA TO CALCULATE SE OF PROPORTION IS AS YOU WRITTEN IN

Rali

Re: variance

p= indicate success
and Q= no success
ok in stats if u want to take oposite then we use 1- ok
for exp oposite of p is 1-p that is equal to q. q is just notation u can say may be S R etc ok p and q is world wide stats notation p mean success and q mean no success
next question is y divide it with n its a probability to get probability we always divide it with whole pop ok and sigma is the notation that mean stander deviation ok

angel73

variance

please anybody explain why do we multiply P with 1-p and then divide it with n to calculate the variance and standard deviation for proportion in population. that is
p(1-p)\n is equal to sigma square. why this p * q where q = 1-p...

confused.