Variation of Sample mean from Population mean is:: (A) Standard error of the mean, (B) Standard error of propoion, (C) Standard error of difference between two means, (D) Standard error of difference between two propoions
Answer is A. 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.