Miller’s Law. “In order to understand what another person is saying, you must assume it is true and try to imagine what it might be true of.”George Miller. Models of Experts Outpredict the original . Internists diagnosing disease College admissions committees Airplane autopilots Why?.
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Categorical or Discrete Numerical Data
Continuous Numerical Data
Plot of Sample Data Over Time
Upper control limit
Lower control limit
Standard deviation of the sample means
Central Limit Theorem
As sample size gets large enough,
distribution of meanvalues becomes approximately normal for any population distribution.
sample mean at time i
= known process standard deviation
Each sample is 4 measurements.
Process mean is 5 lbs.
Process standard deviation is 0.1 lbs.
Determine 3σ control limits.
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A = B
A2 = AB
A2 - B2 = AB - B2
(A + B) (A - B) = (A - B) B
(A + B) (A - B) = (A - B) B (A - B) (A - B)
(A + B) = B
A + A = A
2A = A
2 = 1
But the overall result is absurd.
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Some people are too busy--