Mean plus 2 sigma
[DOC File]The following is an excerpt from Chapter 3 of The Six ...
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However, if a special normal distribution table is consulted (very few go out to Six Sigma) one finds that the expected non-conformances are 0.002 PPM (2 parts-per-billion, or PPB). The difference occurs because Motorola presumes that the process mean can drift 1.5 sigma in either direction.
[DOC File]How to analyze tolerances using Excel - ASQ
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The entries of the Mean and the modified standard deviation or sigma are as follows: 3 1 = 3 Column A: Vz . Row 2: Mean minus Sqrt 3 times sigma . 3: Mean. 4: Mean plus Sqrt 3 times sigma . Repeat the cycle until row 244. 3 2 = 9 Column B: VBE . Row 2: Mean minus Sqrt 3 times sigma.
[DOC File]Ch
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1 Estimating Mu when Sigma is Known 2 – 5. 2 Estimating Mu when Sigma is Unknown 6 – 8. 3 Estimating p in the Binomial Distribution 9 – 11. 4 Estimating Mu1–Mu2 and p1–p2 12 – 16 Overview of Chapter 8 Concepts. The best point estimate of the population mean is the same mean, because:
[DOC File]Problem Set #1
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For large sample sizes the sampling distribution of p^ will be approximately normal with mean equal to ‘p’ (the true population parameter value) and the standard deviation (σ aka sigma) is given by: σ = (p*(1-p)1/2 / (n)1/2 (which in this case is estimated at .0029) .
[DOC File]http://www
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Where the sigma comes in is that, for example, a process capability (or Cpk) of 1.0 is roughly equivalent to a capability level of 3 sigma, commonly called three sigma capability. That is, the mean plus and the mean minus three standard deviations should be the point at which the closest specification lies.
[DOC File]EARTHQUAKE GROUND MOTION GENERATION FOR
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The aim of generating a mormalised mean plus one sigma spectra for such a range of S2 level of earthtquake time histories is to generate a mean plus one standard deveiation spectra i.e. to define ...
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