Using four samples of 200 credit card statements each, an a
Using four samples of 200 credit card statements each, an auditor… Using four samples of 200 credit card statements each, an auditor found the following number of erroneousstatements in each sample: Sample 1 2 3 4Number of Errors 4 2 5 9a. Determine the proportion of defectives in each sample.b. If the true proportion of defectives for this process is unknown, what is your best estimate of it?c. What is your estimate of the mean and standard deviation of the sampling distribution of the sampleproportion of defectives for samples of 200?d. What control limits would give an alpha risk of 0.03 for this process?e. What alpha risk would control limits of 0.047 and 0.003 provide?f. Using control limits of 0.047 and 0.003, is the process in control?g. Suppose that the long-term proportion of defectives of the process is known to be 2 percent. What arethe values of the mean and standard deviation of the sampling distribution?h. Construct a p-control chart for the process, assuming a proportion of defectives of 2 percent, and two-sigma control limits. Is the process in control?Business
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