The sample mean is the sum divided by 8 (the number of people) Call than number Xm.
The standard deviation is the square root of the average of [Salary ^2] - Xm^2.
You could also calculate it as the square root of the average of [Salary -Xm)^2
The first way is faster.
Sample salaries (in dollars) of high school teachers are listed. Find the sample mean and standard deviation of the data.
49,632
54,619
58,298
48,250
51,842
50,875
43,219
49,924
1 answer
1 answer