6.
Process or Product Monitoring and Control
6.5. Tutorials 6.5.4. Elements of Multivariate Analysis 6.5.4.3. Hotelling's T squared
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Control limits | In Phase II, each value of \(Q_j\) would be plotted against the UCL of $$ \frac{p(m+1)(m-1)}{m^2 - mp} F_{\alpha,\, (p, \, m-p)} \, , $$ with, as before, \(p\) denoting the number of characteristics. | ||
Further Information | The control limit expressions given in this section and the immediately preceding sections are given in Ryan (2000, Chapter 9). |