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.
A cocktail glass is a stemmed glass with an inverted cone bowl. Though they are often referred to as martini glasses, they differ from martini glasses in that they have smaller, narrower bowls with rounded or flat bottoms, while martini glasses generally have larger, wider bowls which are fully conical at the bottom. It is mainly used to serve cocktails.