Question: Studies on a machine that molds plastic water pipe indicate that when it is injecting 29.03 mm diameter pipe, the process standard deviation is 0.91

Studies on a machine that molds plastic water

Studies on a machine that molds plastic water pipe indicate that when it is injecting 29.03 mm diameter pipe, the process standard deviation is 0.91 mm. The pipe has a specification of 29.03 mm plus or minus 1.65 mm. What is the process capability index (Cp)? a. 0.6044 b. 1.813 C. 0.3022 d. 1.209 Six samples of five observations each have been taken for a process. The sample means and ranges computed (in minutes) are, (mean, range): (3.99, 0.73), (3.92, 0.54), (3.77, 0.44), (3.95, 0.77), (3.76, 0.58), and (4.07, 0.64). Compute the upper control limit a. 2.884 b. 4.206 c. 4.268 O d. 2.493 The specification limits for a product are 9.43 cm and 11.1 cm. A process that produces the product has a mean of 10.23 cm and a standard deviation of 0.15 cm. What is the process capability, Cpk? a. 3.711 O b. 1.856 C. 1.933 d. 1.778 Clear my choice

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