A(n) _____________ is the discrepancy between an observed and a true value that arises because only a portion of a population is observed.

After _____________________, President George W. Bush saw presidential approval ratings at an all-time high

Fill in the blank(s) with correct word

Compared to Gorbachev’s reforms in the USSR, Deng’s reforms

a. were more cautious in the area of economics. b. were more cautious in the area of politics. c. placed less emphasis on the role of the communist party. d. were not particularly successful.