How to calculate:
Stadandard deviation - SD
n kn n…number of measurements
SD = kn * R 2 0,8862
3 0,5908
Range - R 4 0,4857
5 0,4299
R = xmax − xmin 6 0,3946
7 0,3698
8 0,3512
9 0,3367
10 0,3249
Relative standard deviation - RSD
RSD = (SD/average)*100