The monthly salaries (in thousands of dollars) of a sample of sales representatives are as follows:
7,6,8,9,12,12.
Find the standard deviation of this sample of monthly salaries. Round your answer to at least two decimal places.
2007-05-28 10:37:09 · 3 answers · asked by Help please 1 in Science & Mathematics ➔ Mathematics
2.30 is your answer
2007-05-28 10:42:54 · answer #1 · answered by bruinfan 7 · 0⤊ 0⤋
As I remember the definition of standard deviation it is the square root of-
(x - avg)^2/n where x= a data point (salary) and avg = the mean (average salary) and n = number of data points.
I calculate the average salary to be 9 and n is 6. I get the sum of the squares of the deviations to be 32 so the standard deviation would be the square root of (32/6) which is about 2.309.
2007-05-28 11:11:11 · answer #2 · answered by skipper 7 · 0⤊ 0⤋
Refer to the source site for the equation that I used, as it is a bit too compicated to type out all the work.
The answer that I got is 2.31.
2007-05-28 10:43:06 · answer #3 · answered by C-Wryte 3 · 0⤊ 0⤋