Statistical Sciences 2141A/B Lecture Notes - Lecture 33: Statistical Process Control, Geometric Distribution, Statistical Hypothesis Testing
4 Dec 2018
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Effective quality control methods have become increasingly important as industries strive to design and produce more reliable products more efficiently. A common assumption is that high quality levels and low are incompatible, but it has become increasingly apparent that raising quality levels can lead to decreased costs, a greater degree of consumer satisfaction and thus increased profitability. In this chapter we will discuss statistical process control and control charts. If the distribution of a rv is (approximately) normal, then: Roughly 68% of the values are within (plus or minus) one standard deviation of. Roughly 95% of the values are within (plus or minus) two standard deviations of. Roughly 99. 7% of the values are within (plus or minus) three standard deviations. 3. the mean [ , + ] the mean [ 2 , + 2 ] of the mean [ 3 , + 3 ]
