Which of the following statements about slavery is not correct? african-american history: select the correct answer from the choices provided. slavery was a very profitable industry that build the united states. the french were the first to profit from the african slave trade. slaves were sold at auction blocks like farm animals. slaves were not considered citizens or even people.

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