N Nasc0 Nov 2012 3 0 Toronto Nov 19, 2012 #1 if i roll a die 600 times. whats the mean and standard deviation of the number of 3's that show?

skeeter MHF Helper Jun 2008 16,217 6,765 North Texas Nov 19, 2012 #2 probability problems go in the statistics forum

P Plato MHF Helper Aug 2006 22,506 8,663 Nov 19, 2012 #3 Nasc0 said: if i roll a die 600 times. whats the mean and standard deviation of the number of 3's that show? Click to expand... If \(\displaystyle p\) is the probability of success and \(\displaystyle N\) is the number of trials then the mean is \(\displaystyle \mu=p\cdot N\) and \(\displaystyle \sigma=\sqrt{Np(1-p)}\).

Nasc0 said: if i roll a die 600 times. whats the mean and standard deviation of the number of 3's that show? Click to expand... If \(\displaystyle p\) is the probability of success and \(\displaystyle N\) is the number of trials then the mean is \(\displaystyle \mu=p\cdot N\) and \(\displaystyle \sigma=\sqrt{Np(1-p)}\).