Question

sample annaul salaries (in thousands of dollars) for employees at a company are listed:

42,36,48,51,39,39,42,36,48,33,63,4245

Determine the unbiased standard deviation. Use your calculator. Round your answer to 4 digits after the decimal. Do not show any work

Answer 1

For the given sample mean is

Create the following table.

data	data-mean	(data - mean)2
42	-1.3846	1.91711716
36	-7.3846	54.53231716
48	4.6154	21.30191716
51	7.6154	57.99431716
39	-4.3846	19.22471716
39	-4.3846	19.22471716
42	-1.3846	1.91711716
36	-7.3846	54.53231716
48	4.6154	21.30191716
33	-10.3846	107.83991716
63	19.6154	384.76391716
42	-1.3846	1.91711716
45	1.6154	2.60951716

Find the sum of numbers in the last column to get.

So