Find the mass of the surface lamina S of density 
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Definitions:
Production Filling
The process of manufacturing, wherein products are filled into their final packaging.
Sample Mean
The average value of a sample set, calculated by adding all the observed values and dividing by the number of observations.
Historical Standard Deviation
A measure of the dispersion or variability of a set of data points from its historical mean, based on past data rather than predictions.
Random Sample
A subset of individuals chosen from a larger population in such a way that every individual has an equal chance of being selected.
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