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.
Cocktail piano is a style generally connected with Liberace, Eddy Duchin, Roger Williams, and others who play popular tunes with lots of great technique â lots of notes, runs, flourishes, and so on. But I hate to catagorize and of these great pianists, as many of them play in other styles as well.