Reconsider the homicide data in Exercise 7.76. Set up an EWMA control chart for this process µ = 0.1 and L = 2.7. Does potential non-normality in the data pose a concern here?
Answer to relevant QuestionsReconsider the data in Exercise 9.9. Set up and apply an EWMA control chart to these data using = 0.1 and L = 2.7. Derive the variance of the exponentially weighted moving average zi. Consider the valve failure data in Example 7.6. Set up a CUSUM chart for monitoring the time between events using the transformed variable approach illustrated in that example. Use standardized values of h = 5 and k = ½. Viscosity measurements on a polymer are made every 10 minutes by an on-line viscometer. Thirty-six observations are shown in Table 9E.5 (read down from left). The target viscosity for this process is µ0 = 3,200. (a) ...Consider the molecular weight data in Exercise 10.16. Construct a CUSUM control chart on the residuals from the model you fit to the data in part (c) of that exercise. Let 0 = 0, = 1 sigma, k = 0.5, h = 5. In Exercise ...
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