Instructor: Sara Stewart
Unique:49610
TH: 610 P
Room: 1.18
012810
Analysis#1
Defining the three statistics: Mean,Standard Deviation, and percent error of the Mean.we
need to have a 500mL plastic bottle labeled as (dH2O) with distilled water (dH2O). we need
to use this water to determine the accuracy of several pieces of volumetric glassware.
We need to refill the bottle with (dH2O) from distilled deionized water tap.
The results would be :
The mean Mass of water Measured (g) would be 58.91.
The standard Deviation
would be 0.251.
The percent error in Mean would be 1.816.
The mean Mass of Water in appears to be the most accurate for measuring a 60 mL volume
because as we see the result the Mass of Water Measured is 58.91. Because of this number
that we have its gonna be the most accurate for measuring a 60 mL Volume. We have 3
different Volume that’s why can’t one determine appears to be the most precise.
Now we need to transfer 60 ml of dH2O from the bottle to 100 mL calibrated cylinder.
The Volume(100 mL Grad.Cyl.) (60 mL):
The Mass of Water is 58.88 g.
..The Volume of (125 mL Flask) (60 mL): The Mass of Water in
125 mL is going to be 55.26 g.
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 Spring '10
 HOFMANNJOHANN
 Standard Deviation, Accuracy and precision, Water Measured

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