The following sample was obtained from a population with unk

The following sample was obtained from a population
with unknown parameters.
Scores: 6, 12, 0, 3, 4
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.)

Solution

That would be... Mean: (6 + 12 + 0 + 3 + 4)/5 = 5 Standard Deviation: v([(6 - 5)² + (12 - 5)² + (0 - 5)² + (3 - 5)² + (4 - 5)²]/(5 - 1)) ˜ 4.472