Question
Inter State Moving and Storage Company is setting up a control chart to monitor the proportion...
Inter State Moving and Storage Company is setting up a control chart to monitor the proportion of residential moves that result in written complaints due to late delivery, lost items, or damaged items. A sample of 40 moves is selected for each of the last 12 months. The number of written complaints in each sample is 7, 9, 4, 9, 2, 6, 11, 8, 5, 5, 6, and 15. Click here for the Excel Data File Insert the mean proportion defective, UCL, and LCL. (Round your intermediate calculations and final answers to 2 decimal places.) Does it appear that the number of complaints is out of control for any of the months? Yes No
Homework Answers
Answer #1
From the given data
As per p-chart, One of the sample point at 12th month is above UCL. Therefore, the process is out of control.
Correct answer: YES
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