Stat. Sampling Distribution - Cooney

• mean of a population
o parameter
o (mu)

• mean of a sample
o statistic
o (x-bar)

• parameter --> population
• statistic --> sample

• sampling bias
o unbiased = the center of the sampling distribution is equal to the mean of the population

• sampling distribution
o the distribution of values taken by the statistics in all possible samples of the same size from the same population

• central limit theorem
o when n is large, (x-bar) is close to normal even if the population is not normal
o (n = sample size)