AS level Stats S1	AS level Stats S1 --------------------- Binomial Distribution ---------------	A Revision Guide
	characteristics  Fixed number of trials (n) Constant Probability (p) only two possible outcomes (yes/no, true/false etc) Independent trials The Formula for x-bin (n,p)  where n = nbr of trials and p = probability of success P(X=x) = nCxpx(1-p)n-x The mean  is e(x) = np The variance  is var(x) = np(1-p)	notes "Distribution" is the way in which the data is arranged. It's characteristics affect the way that we must deal with it.
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