As a thumb rule a minimum of 50 randomly selected samples must be chosen for. process performance studies and a minimum of 20 subgroups (of sample size, preferably of at least 4 or 5) must be chosen for process capability studies.
: a usually iced drink of wine or distilled liquor mixed with flavoring ingredients. : something resembling or suggesting such a drink as being a mixture of often diverse elements or ingredients. : a mixture of agents usually in solution that is taken or used especially for medical treatment or diagnosis. : of, relating to, or set aside for cocktails. : designed for semiformal wear.
The GI cocktail-a mixture of liquid antacid, viscous lidocaine, and often an anticholinergic agent-is frequently used as a diagnostic tool in emergency care to separate ischemic chest pain from dyspepsia. The theory is that if the pain is relieved, the patient isn't having a heart attack. However, in a retrospective study of a three-month period at Vanderbilt University Medical Center, researchers found the cocktail was being served a bit too freely.