Statistical analysis of power of test for research design

الملخص EN

Statistical Power analysis or simply power analysis is a very important task in research problems design .The problem motivating this topic is to identify the components of power analysis for a prior study .Sample size determination is an important step in planning statistical study where an estimate of error variance and specification of effect size is essential for power analysis and sample size determination , because without determination of optimum sample size , the research or experiment will lack the precision or time and resources will be wasted.

This paper discusses the relationship among the components of power analysis.

Some related terms such as confidence intervals were outlined, and illustrations on theoretical data would be carried .Results and conclusions would be given on the basis of the study showing the relationship among power analysis components.