Real life Part I

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8.13
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Real life Part I Measure resistors UB9/12/06
Manufacturer 5 2.20 0.01 k?
ltRgt 2.178 0.023 k? OK
Both histogram show the same data Finer binning
sometimes confusing -gt Lower statistic/bin
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Real Life Part II
Both 8.13 Groups same Systematics of DVM-gt
small difference, bothgap Manufacturer 100 5 ?
Group1 9/10/04
what??
ltRgt 103 ?? ? Not an independent
sample!! Best ones were selected out
(gap)!! Never a normal distribution. Variance can
still be quoted 7 ? !!!
Group1 9/10/04
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Gaussian errors
Gaussian Shape?
Poisson error
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Back to our measurements of the muon lifetime
?2/dof 0.3 for ? 4-2, which is fine. Result
?(?) 2.3?0.6 ?s not accurate - nobody cares
?2/dof 18.1 for ? 8 - 2, exponential
(hypothesis) or data doubtful. Note the first
point is gt4? off the curve 16 to ?2. Was started
to late, delete. NOW ?(?) 2.05?0.03 ?s
good!
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More Bevington, Taylor. Lets go!