A representative sample is a subset of a population that seeks to accurately reflect the characteristics of the larger group. For example, a classroom of 30 students with 15 males and 15 females ...

Such samples must be representative of the chosen population studied. They must be randomly chosen, meaning that each member of the larger population has an equal chance of being chosen.

For example, a nationally representative sample of 1,000 Americans wouldn’t include enough people to support reliable estimates for many small groups, such as Muslims or Korean Americans. One way to ...

many sample-balancing methods have been designed to balance the two classes of samples before modeling, but they lack sufficient performance verification, especially on large data sets. This paper ...