Your boss has asked you to evaluate the reject percentage for the past year on one of the production lines. Use the following data to construct a run chart. Does there appear to be a pattern in the change in reject rate over the year?
Month Reject%
Jan 3.7
Feb 3.3
Mar 3.1
Apr 3.5
May 3.3
June 2.7
Jul 3.0
Aug 2.3
Sep 2.5
Oct 2.2
Nov 1.6
Dec 1.7