Propagation of Uncertainty Systematic Error

If you use an uncalibrated 25-mL Class A volumetric pipet four times to deliver a total of 100 mL, what is the uncertainty in 100 mL Because the uncertainty is a systematic error, the uncertainty in four pipet volumes is like the uncertainty in the mass of 4 moles of oxy- 

Calibration improves accuracy. Suppose that a calibrated pipet delivers a mean volume of 24.991 mL with a standard deviation (a random variation) of 0.006 mL. If you deliver In this example, calibration reduces the four aliquots from this pipet, the volume delivered is 4 X 24.991 = 99.964 mL and the 

Write each answer with a reasonable number of figures. Find the absolute and percent relative uncertainty for each answer. 

How many significant figures are there in the following numbers  

Round each number to three significant figures  

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