Question: Control charts for X-bar and Range (R.) are maintained on the resistance in ohms of electrical part. The size of the samples is 5. After

Control charts for X-bar and Range (R.) are maintained on the resistance in ohms of electrical part. The size of the samples is 5. After 6 samples, the sum of all samples means is 2046.5 ohms and the sum of all samples Ranges is 17.4 ohms. Lower control limits of R and X-bar, respectively are. I Select one: O a. O and 339.4 b. O and 407.63 O c. 6.12 and 339.4 d. 0 and 410.97 e. O and 342.76

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