Mean

1
Mean Standard Deviation of a Sample Mean

• Let be the mean of a SRS of size n from a
  population having mean m and standard deviation
  s. The mean and standard deviation of are

2
Central Limit Theorem

• Draw a SRS of size n from any population with
  mean m and finite standard deviation s. When n is
  large, the sampling distribution of the sample
  mean is approximately normal is
  approximately