- The sampling distribution of the sample mean becomes approximately normal as n becomes large - A single statistic that is used to estimate a population parameter - v 1 - a - A range of values of a sample statistic that likely contains the population parameter - (Upper confidence limit - Lower confidence limit)/2 - Failure to reject a false null hypothesis - If we fail to reject Ho at a = 0.04 we must also fail to reject it at - If we reject Ho at a = 0.05 we must also reject it at - Rejecting Ho: H