Central Limit Theory
	q In the limit, as the sample size becomes large, the sum (or the mean) of a set of independent measurements will have a normal distribution, irrespective of the distribution of the raw data. q If there is a population which has a mean of mand a standard deviation of s, then the distribution of its sampling means will have: (1)  a mean m x = m, and (2)  a standard deviation sx = s/(N)1/2 = standard error of the mean