In the first three weeks of 2009, after the price of its main export, oil, plummeted, Russia depreciated its ruble six times. This is an example of the principle of __________

A researcher conducts a study on grades of students who live in apartments compared with those who live in dorms. In actuality, the grades are equivalent in both groups. After statistical analysis he makes the decision to not reject the null hypothesis

This decision is A) Correct. B) A Type I error. C) A Type II error. D) Not possible to evaluate from the information given.

Through 2000, the Constitution had been amended twenty-seven times

Indicate whether the statement is true or false