Assignment:
Johnson Company produces plastic bottles to customer order. The quality inspector randomly selects four bottles from the bottle machine and measures the outside diameter of the bottle neck, a critical quality dimension that determines whether the bottle cap will fit properly. The dimensions (inch) from the last six samples are provided below.
![2092_P 4.jpg](https://secure.tutorsglobe.com/CMSImages/2092_P 4.jpg)
1. What are the control limits for the R chart?
2. What are the control limits for the x-bar Chart?
3. Is the process in control?