Identify the independent variable, the dependent variable, andthe unit of analysis in the following hypothesis:
a.      Interstate migration in theUnited States lowers state poverty levels.
b.     Documented immigrants in theUnited States are less likely than undocumented immigrants to usesocial welfare programs.
c.      On average, the annualhousehold income of female-headed households is about 25% less thanthe annual household income of married couple households.
d.     Geographically, contiguouscountries should experience higher rates of migration thannoncontiguous countries.
e.      In the United States, fewerBlacks than Whites own their home as opposed to rent theirhome.
