Applied survey methods for development projects

This step-by-step illustrative guide is thus designed to familiarize A.I.D. personnel responsible for project formulation, monitoring, and evaluation with the underlying principles and processes of data gathering and analysis so that they may make better quantitative analyses. This guide contains 87 short units covering basic statistical techniques and concepts including: data collection methods; average, mean, median, mode, and range; standard deviation; determining sample size; judgement, scientific, and random sampling; standard error of the mean; cluster samples; confidence interval and standard error of percentage; the "T", "Z", and "Chi Square" tests; and regression analysis. Principles of designing and carrying out surveys are explained, including analysis and presentation of results in written reports and in briefings. Numerous sample problems and calculations are included throughout the guide. Appended are six calculation tables, including random digits, and the normal curve and related probability.