Nala is at a parent teacher association meeting. the people at the meeting discuss the parents concerns of whether or not the children have enough time for lunch. nala and the rest of the parents argue that the children need more time to eat, but the teachers explain that they cannot take away from classroom time. this is an example of a(n)

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