This latter property is what enables investigators to calculate a margin of error.. To be precise, the laws of probability make it possible for us to calculate intervals of the form estimate +/- margin of error.
Congress can't reverse a US Supreme Court ruling, but they can rewrite an overturned law or can initiate a new constitutional amendment (must be ratified by 75 â¦ % of the states) to override the decision. They usually choose to rewrite the law, because it is extremely difficult to amend the Constitution.
This means that a constitutional amendment is not needed to overturn the Civil Rights Act, which is vulnerable to a subsequent act of Congress or, more to the point, a decision by the Supreme Court. Ten years ago, even mentioning this possibility would have seemed outrageous.