It is the scientific study of human society and social relationships. It's also the subject within the field of social science, such as economics or politics. Hope this helps you!
I believe the answer is: Washington DC
Washington DC is a place where most of the government meetings conducted on federal level is being held (along with the president's office) . Because of this, both major political parties in united states are headquartered in this area for the convenience of their members.
This is known as NULL HYPOTHESIS.
In a statistical set, a null hypothesis is an hypothesis which states that there is no significant difference between specified data set. Null hypothesis is typically used to propose that no significant difference exist in a given set of observation.