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Your tasks:
Select a random sample of 24 hours of data. [Feel free to do it manually, if you cannot use the sample selection procedure in the software. Using the sample data, accomplish the following:
Part 1
1. Construct an x-barchart. Need to use graph paper.2. Calculate and plot the centerline and upper and lower control limits for the charts.3. Calculate and plot the A, B and C zone boundaries of the x-bar chart. 4. Plot the 24 sample means on the x-barchart.5. Based on x-bar findings, is the process under statistical control? Explain and justify your answer. Part 2
6. Construct an R-chart. Need to use graph paper.7. Calculate and plot the centerline and upper and lower control limits for the charts.8. Calculate and plot the A, B and C zone boundaries of the R-chart. 9. Plot the sample ranges on the R-chart.10. Analyze the pattern of the R-chart.11. Based on R-chart findings, is the process under statistical control? Explain and justify your answer. Part 3 12. Theoretically, what is the difference between x-bar chart and R-chart? Explain briefly.13. How are they used? That is, what is their purpose? Explain briefly. Part 4 14. Compare the findings from your x-bar chart and R-chart.15. Explain why rational sub-groupings are used in constructing control charts?16. What are the major findings from the study? Explain briefly.17. What are your conclusions from the study? Explain briefly.
Attachment:- Data.xls
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