BLOCK SAMPLING Meaning and
Definition
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Block sampling is a systematic sampling technique used in research and statistical analysis, where the population is divided into distinct groups or blocks, and a sample is randomly selected from each block.
In block sampling, a specific characteristic or variable is used to create the blocks. This characteristic is directly related to the research question or objective under investigation. The blocks are created such that each block is internally homogeneous, meaning that the individuals within a block are similar in terms of the characteristic being examined. This technique ensures that the sample is representative of the overall population and provides a more accurate estimate of the population parameters.
The selection of samples within each block is typically done randomly or using a systematic approach. Each block is treated as a mini-population, and the sampling method is applied independently to each block. This approach allows for comparison and analysis of different characteristics within each block and enables researchers to measure variations within and across blocks.
Block sampling is commonly used in large-scale studies, such as public opinion surveys, scientific research, market research, and quality control in industrial production. By dividing the population into blocks and selecting samples from each block, researchers can obtain a representative sample that provides accurate estimates and minimizes bias. This technique is particularly useful when the population is heterogeneous and contains subgroups with notable differences in the characteristic of interest.
Etymology of BLOCK SAMPLING
The term "block sampling" is a combination of two words: "block" and "sampling".
1. Block: The word "block" has multiple etymological origins. It derives from the Old English word "blocca", which means "log". It can also be traced back to the Middle Dutch word "block" or "blok", which refers to a large piece of wood or tree trunk. The word "block" eventually came to denote a solid mass or something that obstructs or hinders.
2. Sampling: The word "sampling" primarily comes from the verb "sample". It originated from the Latin word "exemplum", meaning "example" or "sample". The verb "to sample" began to be used in English during the late 18th century and referred to the act of taking or examining a small portion or specimen from a larger group or population to represent the whole.
Similar spelling word for BLOCK SAMPLING
