Measure the convergence of annual provincial data relative to the national. I have data for per capita annual income for two provinces and I have to compare them with the per capita national data and evaluate if the provincial data converge toward the national data. Can I do this with variance or standard deviation? I have no idea how to go about this task but I'm pretty sure it shouldn't be to complex. I plan to work with the Excel program so if you could include how to do this with Excel that would be much apprieciated.