how do you find the standard error of the sample mean
Standard error Therefore, the relationship between the standard error and the standard deviation is such that, for a given sample size, the standard error equals the standard deviation divided by the square root of the sample size. In other words, the standard error of the mean is a measure of the dispersion of sample means around the population mean.
SAT Subject Test in Chemistry The test has 85 multiple choice questions, each consisting of five answer choices, that are to be answered in one hour. Students receive 1 point for every correct answer, lose Â¼ of a point for each incorrect answer, and receive 0 points for questions left blank. This score is then converted to a scaled score of 200-800. The mean score for the 2009 test administrations was 638, standard deviation 113.[1] In 2011, the mean score was 648 with a standard deviation of 110.