The tin and zinc contents of a brass sample are analyzed with the following results: (a) Zn: 33.27, 33.37, and 33.34% and (b) Sn: o.022, 0.025, and o.026%. Calculate the standard deviation and the...

Extracted text: The tin and zinc contents of a brass sample are analyzed with the following results: (a) Zn: 33.27, 33.37, and 33.34% and (b) Sn: o.022, 0.025, and o.026%. Calculate the standard deviation and the coefficient of variation for each analysis.