If you cluster your sample, first determine the number of clusters you will select. The number of clusters (e.g., communities, villages, administrative units, groups) should be decided based on the variability between clusters and the variability within clusters. Aim to capture the greatest degree of variability within your sample. If...
standard sampling equation to determine a sample size
Use the standard sampling equation to determine a sample size sufficient for generalizing results to represent the target population In determining an appropriate sample size (i.e., the number of units to be surveyed), consider the sampling methodology (i.e., how sampling units, such as households, will be selected) and the analysis...
Use random sampling when collecting quantitative data
Random sampling, also known as probability sampling, is statistically representative of a survey population. 33 In other words, an appropriate random sample allows us to survey a number of households and to generalize our findings to describe the larger target population, including those households that have not been surveyed. By...