Question: Consider the minute clinic waiting time data in Exercise 6.66. Set up an EWMA control chart for monitoring this process using ï¬ï = 0.4. Compare

Consider the €œminute clinic€ waiting time data in Exercise 6.66. Set up an EWMA control chart for monitoring this process using ï¬ï€ = 0.4. Compare this EWMA chart to the one from Exercise 9.16.

From 6.66: TABLE 6E.24 Clinic Waiting Tine for Exercbe 6.66 Waiting Waning Waiting Observatin Time Ohseryatn Time servation Time 14 21 14 2 339 12 50 266 741 134%21467 4 28814 167 4 54 249 076 15 1635 50 132 16 4 26 40 T 70 7 1519 39 137 18 06728 LI 814 29 69 617 512 20 216 10 30 3699 11 = X = 4.65; MR2 = 4.32; =MR2/d,=4.32/1.128 = 3.83

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