Glasnost was introduced by Mikhail Gorbachev

Addressing the null hypothesis in time-series designs is done by

A) simply inspecting the time graph B) using simple t-tests. C) sophisticated statistical procedures D) computing the correlation coefficient.

During the 1980s, which proposed amendment to the Constitution was rejected?

a. allowing prayer in schools b. lowering the voting age to 16 c. raising the voting age to 21 d. the right to bear arms e. limits on freedom of speech