Which of the Following Statements Best Describes the Value of an 'Effect

Multiple Choice

Which of the following statements best describes the value of an 'effect size' to research?

A) It has a key role to play when calculating assumptions about collected data.
B) It is a vital statistic when calculating the significance of an experimental study.
C) It is a measure of the power of an experiment and therefore its significance.
D) It is a standardized measure that allows for the comparison across different studies that have used different variables or measurement scales.