Samples - Samples If assignable causes are present the...

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1 Samples (e) If assignable causes are present, the process output is not stable over time and is not predicable Weight T i m e Frequency Prediction ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Figure S6.1
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2 Population and Sampling Distributions Three population distributions Beta Normal Uniform Distribution of sample means Standard deviation of the sample means = σ x = σ n Mean of sample means = x | | | | | | | - 3 σ x - 2 σ x - 1 σ x x + 1 σ x + 2 σ x + 3 σ x 99.73% of all x fall within ± 3 σ x 95.45% fall within ± 2 σ x Figure S6.3
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3 Control Charts Constructed from historical data, the purpose of control charts is to help distinguish between natural variations and variations due to assignable causes
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4 Types of Data þ Characteristics that can take any real value þ May be in whole or in fractional numbers þ Continuous random variables Variables Attributes þ Defect-related characteristics þ Classify products as either good or bad or count defects þ Categorical or discrete random variables
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This note was uploaded on 01/20/2012 for the course MGT 3200 taught by Professor Moodie during the Spring '08 term at Kennesaw.

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Samples - Samples If assignable causes are present the...

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