North Korea is a communist country
Random sampliing helps to remove various biases that come with selection of subjects. In statistics, random sampling, is considered the best way to obtain a representative sample of a population.
In the beginning not good, the romans believed in many deities and in the christian/ jewish religion it was a sin to believe in any god other than their god. The romans allowed them to live their peacefully as king as the once in awhile made a public offering to jupiter, the deity who protects the emperor, however this went against their religion, punishment for disobeying roman law was often cruel and led to death
Price ceilings prevent a price from rising above a certain level. When a price ceiling is set below the equilibrium price, quantity demanded will exceed quantity supplied, and excess demand or shortages will result. Price floors prevent a price from falling below a certain level.
This idk but i have a friend who might know it thou