Homework #3 1. Suppose that you buy a book from an online bookshop and there has been a delay in receiving your book. What are the reasons for delayed delivery? Prepare a cause-effect diagram to analyze possible causes. 2. A town's department of public works is concerned about adverse public reaction to a sewer project that is currently in progress. Because of this, the Commissioner of Public _-_-l--l-il -\"--_-_ Works has authorized a weekly survey to be conducted of town residents. Each week, a sample of 100 residents is questioned on their feelings towards the project. The results to date are shown below. Analyze this data using an appropriate control chart with a two- sigma limit error. Is the community sentiment stable? TrueiFalse 3. ISO 9001 certication requires an ongoing series of audits and the need to be re- registered every three years. 4. A sample statistic that falls inside the control limits suggests there is assignable variation in the process. 5. Six sigma quality refers to achieving process variation so small that the half-width of the design specication equals six times the standard deviation of the process