Question from Iris, a student:

Help please: me on this type of math problem I can get through step one after that I get lost. Maybe you can explain it to me in a easier way to get the correct results. I have read the examples, but I am still lost cannot move on until the next practice until I get this one

Sample standard deviation
The following are distances (in miles) traveled to the workplace by employees of a certain computer company.

15,29,32 28 18 28
Find the standard deviation of this sample of distances. Round your answer to at least two decimal places.
(If necessary, consult a list of formulas.)

The measurements given constitute a sample, and we're asked to compute the sample standard deviation. The sample standard deviation, denoted by , is a measure of the "spread" of the measurements in a sample about their mean .
In order to find the standard deviation, we first find the mean of the sample:

We then compute the standard deviation as follows: How do I get 232 from these numbers if you could break in down by each step, I know that you Multiply & then add, but what numbers do you Multiply and add together. I am not getting it. I need help

(15-25)x2+(29-25)x2+(31-25)x2+(38-25)x2+(18-25)x2+(28-25)x2 over 6-1 I need a step by step hoe the answer is 232

i START LIKE THIS TRYING TO SOLVE (15-25)=-10 10X10=100 YHEN I GET LOST ON THE NEXT THINS TO DO, i DO THIS FOR EACH SET OF NUMBERS.