Jane Addams worked for laws to end child labor. What does this mean?

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

Which are components pf a political party? why do we need political parties give reason.

Who is eric smith what did he do to derrick robie? did he stick a stick inside derrick robie?