Standard error of the mean
The standard deviation of a normal random variable is 20. If a sample of 225 is selected out of a large population, what is the standard error of the mean? Round to 3 decimal places.
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Argon contained in a closed, rigid tank, initially at a temperature of 50C, pressure of 2 bar, and a volume of 2m^3, is heated to a final pressure of 8 bar.
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