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.
![1095_Bottle.jpg](https://secure.tutorsglobe.com/CMSImages/1095_Bottle.jpg)
What are the control limits for the R chart?
What are the control limits for the x-bar Chart?
Is the process in control?