Parts manufactured by an injection modeling process are subjected to a compressive strength test. Twenty samples of five parts each are collected, and the compressive strengths (in psi) are shown in Table 5E.6.
Answer to relevant QuestionsReconsider the data presented in Exercise 5.26. b. Does the S chart detect the shift in process variability more quickly than the R chart did originally in part (b) of Exercise 5.26? Continuation of exercise 5.20. The next five measurements on viscosity are 3163, 3199, 3054, 3147, and 3156. Do these measurements indicate that the process is in statistical control? In exercise The weights of nominal 1-kg containers of a concentrated chemical ingredient are shown in Table 5E.14. Prepare a normal probability plot of the data and estimate process capability. When taking samples of subgroups from a process, do you want assignable causes occurring within the subgroups or between them? Fully explain your answer.
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