4. A Quality Analyst wants to construct a control chart for determining whether four machines, all producing the same product, are under control with regard to a particular quality attribute. Accordingly, she inspected 1,000 units of output from each machine in random samples, with the following results: What are the control chart upper and lower control limits for z=1.96 ? A. 0272 and .0128 B. 0287 and .0113 C. 029 and .013 D. .0303 and .0097 E. 0332 and .0068 5. Which is not a true assumption in the EOQ model? A. Production rate is constant B. Lead time doesn't vary C. No more than 3 items are involved D. Usage rate is constant E. No quantity discounts 6. In the basic EOQ model, if annual demand is 50 , carrying cost is $2, and ordering cost is $15,EOQ is approximately: A. 11 B. 20 C. 24 D. 28 E. 375 7. With an A-B-C system, an item that had a high demand but a low annual dollar volume would probably be classified as: A. A B. B C. C D. none of these 8. If average demand for an inventory item is 200 units per day, lead time is three days, the reorder point is: A. 100 units B. 200 units C. 300 units D. 600 units E. 700 units 2. A plot below the lower control limit on the range chart: (I) should be ignored since lower variation is desirable (II) may be an indication that process variation has decreased (III) should be investigated for assignable cause A. I and II B. I and III C. II and III D. II only E. I, II, and