how small should a sampling be how big of a sample do you need what size of sample is needed for a 95% confidence interval what is the average sampling size how big of a sample is 30 what is the sampling size for a population why is 30 considered an acceptable sample size what is the average sample size of a population? what is the lowest possible sample size what's a good sample size what is the lowest confidence interval how small of sample size is needed to test? why is sample size higher what is the average sample size what is the confidence interval in statistics what is the average sample size how big of a population do we have what is the standard sample size what is the sampling limit for the sample sample size is considered what