Find the standard deviation

Question

Find the mean, range, and standard deviation of the data.

Sample A: 26,30,34,38,42,46,50. (Round to two decimal places if needed)

 

I have the mean and range, but I need help finding the standard deviation. The total from the data set that I have is 448.

Answer 1

You found the variance of 448

 

Standard Deviation = square-root( variance/(N-1))

 

This time you have N=7 statistics in the data set.

 

so standard deviation = square-root(446/6) = 8.640998

 

Keep up the good work!