A Quality Manager in a Small Manufacturing Company Wants to Estimate

question 71

Multiple Choice

A quality manager in a small manufacturing company wants to estimate the proportion of items produced by a very specialized process that fail to meet a customer's specification.Because it is very expensive to determine if an item produced by the process meets the specification,only a very small number of items can be tested.A random sample of 15 items was selected,and in the sample three of them failed.Based on the sample results,the plus four estimate of the true proportion of items that failed to meet the customer's specifications is _______.

• A) = 0.200
• B) = 0.158
• C) = 0.333
• D) = 0.263
• E)Not within ± 0.02 of any of the above