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Parts Manufactured by an Injection Molding Process Are Subjected to a Compressive

Question 61

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Parts manufactured by an injection molding process are subjected to a compressive strength test.We monitor the compressive strength of the parts manufactured by this process using an Parts manufactured by an injection molding process are subjected to a compressive strength test.We monitor the compressive strength of the parts manufactured by this process using an and an s control chart.Samples of size 9 are taken at regular intervals,and their mean compressive strength (in psi = pounds per square inch) and standard deviation are plotted on the charts in time order.The overall mean of the sample means is <sub> </sub> = 81.2 psi,and the sample standard deviation of all measurements is s = 3.0 psi.Specifications call for the compressive strength of parts to be 80 ± 2.5 psi.The control chart constants are (partially) reproduced below. What is the value of an estimate of the capability index C<sub>pk</sub>? A) 0.140 B) 0.144 C) 0.269 D) 0.278 and an s control chart.Samples of size 9 are taken at regular intervals,and their mean compressive strength (in psi = pounds per square inch) and standard deviation are plotted on the charts in time order.The overall mean of the sample means is Parts manufactured by an injection molding process are subjected to a compressive strength test.We monitor the compressive strength of the parts manufactured by this process using an and an s control chart.Samples of size 9 are taken at regular intervals,and their mean compressive strength (in psi = pounds per square inch) and standard deviation are plotted on the charts in time order.The overall mean of the sample means is <sub> </sub> = 81.2 psi,and the sample standard deviation of all measurements is s = 3.0 psi.Specifications call for the compressive strength of parts to be 80 ± 2.5 psi.The control chart constants are (partially) reproduced below. What is the value of an estimate of the capability index C<sub>pk</sub>? A) 0.140 B) 0.144 C) 0.269 D) 0.278 = 81.2 psi,and the sample standard deviation of all measurements is s = 3.0 psi.Specifications call for the compressive strength of parts to be 80 ± 2.5 psi.The control chart constants are (partially) reproduced below. Parts manufactured by an injection molding process are subjected to a compressive strength test.We monitor the compressive strength of the parts manufactured by this process using an and an s control chart.Samples of size 9 are taken at regular intervals,and their mean compressive strength (in psi = pounds per square inch) and standard deviation are plotted on the charts in time order.The overall mean of the sample means is <sub> </sub> = 81.2 psi,and the sample standard deviation of all measurements is s = 3.0 psi.Specifications call for the compressive strength of parts to be 80 ± 2.5 psi.The control chart constants are (partially) reproduced below. What is the value of an estimate of the capability index C<sub>pk</sub>? A) 0.140 B) 0.144 C) 0.269 D) 0.278 What is the value of an estimate of the capability index Cpk?


A) 0.140
B) 0.144
C) 0.269
D) 0.278

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