random sampling definition iid random sample iiid definition what is the difference between a random and independent variable what is random sample and iid mean what is random sample in statistic what is an iid random variable random sample arithmetic what is random sample random variable what is the difference between random sample and iid what is random sample and random sampling what is random sampling in statistics what is the definition of random variable what's the difference between random sampling and iid testing? random sampling definition statistics which is a random variable what is the definition for random sampling what's the difference between random sample and random variable what is random variable and random sample in math what is random sampling i.i.d mean yahoo what is random sampling and random sampling