Question: 2 8 - 3 . a . In the analysis of a barrel of powder, the standard deviation of the sampling operation is (

28-3.
a. In the analysis of a barrel of powder, the standard deviation of the sampling operation is \(\pm 4\%\) and the standard deviation of the analytical procedure is \(\pm 3\%\). What is the overall standard deviation?
b. To what value must the sampling standard deviation be reduced so that the overall standard deviation is \(\pm 4\%\)?
2 8 - 3 . a . In the analysis of a barrel of

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