Problem
My research question is"How has the COVID-19 pandemic affected existing racial inequalities?" I am use face-to-face surveys for this research. For the independent variable I am focus on diagnosing viruses and government and healthcare system requirements. For the dependent variable I am focus on finance between races, including economic inequality between races employment gap between races. I am using stratified sampling, the sampling frame can be the health insurance enrollment information.
How to evaluate my research design in terms of reliability, construct validity, internal validity, and external validity.