Variation of Sample mean from Population mean is:
Standard error: It is the variation of sample mean from population mean. Sample mean is known as statistic. Population mean is known as parameter. - Standard detion is the variation in a single value from the mean of a sample.
Normal Distribution, Skewed Distributions
Standard error of the mean
Standard error of propoion
Standard error of difference between two means
Standard error of difference between two propoions
Standard error of the mean