Hey ppl just got back from watching my daily motivational videos, i watch them daily because we all need a pick me up sometimes! keep an eye out for my new question after this! im gonna be posting a reality check in a bit... stay safe!

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