How to Choose a Sample Size refers to the process of determining the number of individuals to include in a research study or survey to ensure that the results are statistically valid. It involves various factors such as the population size, desired confidence level, and margin of error. An appropriate sample size allows researchers to make accurate inferences about the larger population from which the sample is drawn.
Choosing a sample size is crucial because it directly impacts the reliability and generalizability of the research findings. A sample that is too small may not accurately represent the population, leading to biased or inaccurate results. Conversely, a sample that is too large may be inefficient and costly to conduct.