A random sample of 200 printed circuit boards contains 18 defective or nonconforming units. Estimate the process fraction nonconforming. Using a 90% two-sided confidence interval, evaluate whether or not it is possible that the true fraction nonconforming in this process is 10%.
Answer to relevant QuestionsA random sample of 500 connecting rod pins contains 65 nonconforming units. Estimate the process fraction nonconforming. Construct a 90% upper confidence interval on the true process fraction nonconforming. Is it possible ...A new purification unit is installed in a chemical process. Before and after installation data was collected regarding the percentage of impurity: Before (1): Sample mean = 9.85, Sample variance = 6.79, Number of samples = ...An article in environment International (Vol. 18, No.4, 1992) describes an experiment in which the amount of radon released in showers was investigated. Radon-enriched water was used in the experiment, and six different ...If the time order of production has not been recorded in a set of data from a process, is it possible to detect the presence of assignable causes? The thickness of a printed circuit board is an important quality parameter. Data on board thickness (in inches) are given in Table 5E.1 for 25 samples of three boards each. b. Estimate the process standard deviation. c. ...
Post your question