Question
Historically, student advising in the College of Business at Tech was done by faculty in the individual departments that housed a stu- dent's major. However,
Historically, student advising in the College of Business at Tech was done by faculty in the individual departments that housed a stu- dent's major. However, the College received poor advising ratings on national student surveys that rank business schools, which caused the College to have a low ranking. In order to remedy this prob- lem the College centralized its advising activity in the Dean's office using full-time, trained advisors. After a transition period the advis- ing office sampled 50 students every week during a semester using a brief in-class survey in classes selected randomly. Any survey that indicated an advising problem was considered one defect. The semes- ter-long survey resulted in 68 total defects.
a. Using this result, develop a p-chart for advising defects using 3 control limits.
b. Given the following survey results for a subsequent semester, indicate if the process is in control:
Week | Number of Defects | Week | Number of Defects |
1 | 7 | 9 | 4 |
2 | 5 | 10 | 6 |
3 | 4 | 11 | 9 |
4 | 8 | 12 | 3 |
5 | 10 | 13 | 8 |
6 | 6 | 14 | 7 |
7 | 9 | 15 | 7 |
8 | 3 |
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