Stacked Haircut: 5 Stylish Ways to Wear the Look. Stacked hairstyles are the look of the season. Scroll through this edit of short styles to get inspired. By now, youâve probably noticed that #shorthair is trending in a major way.
What is 'Sampling'. Sampling is a process used in statistical analysis in which a predetermined number of observations are taken from a larger population. The methodology used to sample from a larger population depends on the type of analysis being performed, but may include simple random sampling or systematic sampling.
Cluster sampling refers to a sampling method that has the following properties. 1  The population is divided into N groups, called clusters. 2  The researcher randomly selects n clusters to include in the sample. 3  The number of observations within each cluster Mi is known, and M = M1 + M2 + M3 + ... + MN-1 + MN.