Question: The weight of a connecting rod used in a diesel engine made at a plant of the General Motors Corporation needs to be strictly uniform to minimize vibrations in the engine. The connecting rod is produced by a forging process. Every day, five rods coming out of the process are selected at random and weighed. The data for 10 days' samples in early 2007 are given below.
![1902_6.png](https://secure.tutorsglobe.com/CMSImages/1902_6.png)
On the 10th day, the supervisor stopped the process, declaring it out of control. Prepare one or more appropriate control charts and test whether the process is indeed out of control.