The communist economic system of the former Soviet Union differs from the United States' free enterprise system in that, in the former Soviet Unionthe economic decisions were made primarily by

Policies that physically separate a minority group from the dominant group.

The second westward surge reached the: mississippi river, appalachian mountains, oregon territory

Pj conducts an experimental study on the effects of soft music during high stakes science testing. he randomly assigns students at the school. in one condition he does not provide music for testing while in the other group he does provide the music. he administers a pretest at the beginning of the year and a posttest at the end of the year. pj’s design is best described as a: a.static group comparisonb. pretest-posttest control group designc.control-group-time-series designd. nonrandomized control-group pretest-posttest design