The failure time in hours of 10 memory devices follows: 1210, 1275, 1400, 1695, 1900, 2105, 2230, 2250, 2500, and 2625. Plot the data on normal probability paper and, if appropriate, estimate the process capability. Is it safe to estimate the proportion of circuits that fail below 1200 h?
Answer to relevant QuestionsDiscuss the logic underlying the use of three-sigma limits on Shewhart control charts. How will the chart respond if narrower limits are chosen? How will it respond if wider limits are chosen? Why is the np chart not appropriate with variable sample sizes? The number of nonconformities found on final inspection of a tape deck is shown in Table 6E.11. Can you conclude that the process is in statistical control? What center line and control limits would you recommend for ...Assembled portable television sets are subjected to a final inspection for surface defects. A total procedure is established based on the requirement that the average number of nonconformities per unit be 4.0 units. What is ...Kaminski et al. (1992) present data on the number of orders per truck at a distribution center. Some of this data is shown in Table 6E.19. Set up a c chart for the number of orders per truck. Is the process in control?
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