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.
When a mixed drink contains only a distilled spirit and a mixer, such as soda or fruit juice, it is a highball; many of the International Bartenders Association Official Cocktails are highballs. When a cocktail contains only a distilled spirit and a liqueur, it is a duo and when it adds a mixer, it is a trio.