n**CLT
**

nfor any m and s, distribution of X and SD approaches normal distribution as n approaches infinity

n**N > 30** Ð
distribution is almost normal

n**Standard error**
Ð measures difference between X and m

nRule of large numbers

nas samples sizes increase, the error decreases

nn = 1, large error (n = 1, error = SD)

nSE = s __ __

…n