Question: The Great North Woods Clothing Company sells specialty outdoor clothing through its catalog. A quality problem that generates customer complaints occurs when a warehouse employee fills an order with the wrong items. The company has decided to implement a process control plan by inspecting the ordered items after they have been obtained from the warehouse and before they have been packaged. The company has taken 30 samples (during a 30-day period), each for 100 orders, and recorded the number of defective orders in each sample, as follows:

Sample                                  Number of defectives

1                                                    12

2                                                    14

3                                                    10

4                                                    16

5                                                    18

6                                                    19

7                                                    14

8                                                    20

9                                                    18

10                                                  17

11                                                   9

12                                                  11

13                                                  14

14                                                  12

15                                                   7

Construct a c-chart for the company that describes 99.74% (3s) of the random variation in the process, and indicate if the process seems to be out of control at any time.