The data below represents the number of complaints recorded at the customer service desk at a local call center. The data shows the number of complaints logged each day over a seven day period.

DAY COMPLAINTS RECEIVED

___________________________________

1 12

2 2

3 7

4 1

5 3

6 0

7 1

What is the upper control limit of the c-chart?

Which of the following are true about the process?

• Special causes of variation are indicated
• There are only common causes of variation
• The process is in control
• Process is within specification limits
• There are only common causes of variation, The process is in control, & Process is within specification limits.