Variable: A variable is a characteristic or measurement that can take on different values within the context of a study or analysis. Factors are a type of independent variable that can be manipulated or controlled to observe their effect on the dependent variable.
Regression Analysis: Regression analysis is a statistical technique used to estimate the relationship between a dependent variable and one or more independent variables or factors. It helps quantify the impact of factors on the outcome of interest.
Experimental Design: Experimental design involves the strategic planning and structuring of experiments to investigate the effects of various factors on a response or outcome. It ensures that the influence of factors can be accurately measured and analyzed.