Explain use method of least squares to find uncertainties

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Reference no: EM13273370

Quantity C2H2 in gas mix measured by mass spec,in which signal for mass number 26 is proportional to volume % C2H2.

Gas Signal (mV)
Blank containing no C2H2 0.2
Unknown 10.8
Unknown + 0.072 vol % C2H2 17.1
Unknown + 0.121 vol % C2H2 20.2
Unknowsn + 0.200 vol % C2H2 30.0
Unknown + 0.364 vol % C2H2 44.6

a) Subtract blank value (0.2 mV) from each measured signal. Make graph to find volume % of C2H2 in unknown

b) Use method of least squares to find uncertainties in slope & intercept of your graph & estimate the uncertainty in answer to a.

Reference no: EM13273370

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