Chapter 9, Problem 7P

The following sample of $n=4$ scores was obtained from a population with unknown parameters.

Scores: 2, 2, 6, 2

a. Compute the sample mean and standard deviation. (Note that these are descriptive values that summarize the sample data.)

b. Compute the estimated standard error for $M$. (Note that this is an inferential value that describes how accurately the sample mean represents the unknown population mean.)