# Question: Set up a moving center line EWMA control chart for

Set up a moving center line EWMA control chart for the temperature data in Exercise 10.24. Compare it to the residuals control chart in Exercise 10.24, part (c).

To find the optimal , fit an ARIMA (0,1,1) (= EWMA = IMA(1,1)):

To find the optimal , fit an ARIMA (0,1,1) (= EWMA = IMA(1,1)):

**View Solution:**## Answer to relevant Questions

(a) Discuss the use of the moving range method to estimate the process standard deviation when the data are positively autocorrleated. (b) Discuss the use of the sample variance s2 with positively autocorrelated data. ...Consider the cost information given in exercise 10.30. Suppose that the process model represented by equation 10.31 is appropriate. It requires 2 h to investigate a false alarm, the profit per hour of operating in the ...The x and R values for 20 samples of size 5 are shown in Table 10E.6. Specifications on this product have been established as 0.550 ± 0.02. (a) Construct a modified control chart with three-sigma limits, assuming that if ...Suppose that there are p = 4 quality characteristics, and in correlation form all four variables have variance unity and all pairwise correlation coefficients are 0.75. The in-control value of the process mean vector is ...Reconsider the situation in Exercise 11.1. Suppose that the sample mean vector and sample covariance matrix provided were the actual population parameters. What control limit would be appropriate for phase II for the control ...Post your question