As the customer service analyst, you have documentation for 126 service calls concerning incorrect product delivery from your study of 30 samples. What is the upper control limit for this control chart? (Keep two decimal places in your answer)
Answer: UCLc= 10.35
Explanation: We will use C chart
Incorrect product delivery= total defects= 126
Total samples= 30
Mean of defects, C= total defects/total samples= 126/30= 4.2
| C-Chart using z= 3 | ||
| Mean, C= | AVERAGE(all defects) | 4.20 |
| Standard Dev (STD)= | sqrt (mean) | 2.05 |
| UCL= | C + z*STD | 10.35 |
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As the customer service analyst, you have documentation for 126 service calls concerning incorrect product delivery...