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Formulas and Tables for Questions 28-31 Setting Mean Chart Limits ( -chart) Upper controllimit. UCL, = + A,R Lower controllim
R-average range of the samples Tables Table 3. Factors for Computing Control Chart Limits (3 sigma) SAMPLE SIZE, n MEAN UPPER
0.200 1.100 Table 4. Cactus Water Volume (ounces) Observation Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Sample 6 Sample 7
Question 28 Using Table 4, the 3-chart, and the R-chart, which of the following is true? The volume meets the six sigma progr
1 . Question 30 Which of the following are 3-chart control limits for the ounces of cactus water data in Table 4? UCLX-11.3 a
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Answer #1

mean of means xbarbar = 11

mean range Rbar= 0.5

UCLxbar = xbarbar + A2* Rbar = 11+0.577*0.5 = 11.2885

LCLxbar = xbarbar - A2* Rbar = 11-0.577*0.5 =10.7115

UCLR = D4*Rbar = 2.115 x0.5 = 1.0575

LCLR + D3 *Rbar =0

28. D The volume is stable and predictable. Option 4 is right

29 C Option 3 is right

30 A Option 1 is right

31 E Option 5 is right

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