The following sample of n = 4 scores was obtained from a population with unknown parameters. Scores: 2, 2, 6, 2 Compute the sample mean and standard deviation. (Note: These are descriptive values that summarize the sample data.) (Round your answers to two decimal places.) M = s = Compute the estimated standard error for M. (Note: This is an inferential value that describes how accurately the sample mean represents the unknown population mean.) sM =.