What is gender? Who has a gender?

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

How does a long war with a high number of casualties generally affect civilians’ and soldiers’ opinions of their government?

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