Mr. Blue has been hired as a consultant by the Reds Company to establish statistical quality control for their production process. Mr. Blue has drawn fifteen samples with four observations in each sample for purposes of setting up control charts. Mr. Blue developed the following \(\mathrm{X}\) chart for the observed data:

Required:
Discuss the usefulness of the \(\mathrm{X}\) chart developed by Mr. Blue.

Transcribed Image Text:

UCI. X LCL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15