Recall that the standard error is the average distance between any given sample mean and the center of its corresponding sampling distribution, and it is a function of the standard deviation of the po...Recall that the standard error is the average distance between any given sample mean and the center of its corresponding sampling distribution, and it is a function of the standard deviation of the population (either given or estimated) and the sample size. The combined estimate of variance using the information from each sample is called the pooled variance and is denoted s2p; the subscript p serves as a reminder indicating that it is the pooled variance.
