Judicial review is the doctrine wherein the courts have the ability and obligation to review actions from the legislative and executive branch to determine whether they are constitutionally permissible.
The best definition of judicial review as established by the Marbury v. Madison case is that is the Supreme Court as the one responsible for defending and interpreting the US Constitution, and to do so it has the power to declare a law unconstitutional if it fails to follow the demands of the Constitution.
Judicial Review is also a part of the separation of powers and the system of checks and balances because it is the power that the judicial branch has to protect and avoid abuses by the other branches.
Explanation: This technique is very common and consists of selecting a population sample that is accessible. That is, the individuals employed in this research are selected because they are readily available, not because they were selected using a statistical criterion.
