Hey guys please stay inside on April 24th theres people saying its national rāpe day and im concerned people might go around hurting people then. Please dont go outside unless necessary and carry pepper spray when you leave the house. Although (hopefully) most people aren't serious some people are and I just want everyone to be 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