Jordan's weight is in the 50th percentile. this means that he weighs 50 percent more than other children his age he weighs 50 percent less than other children his age the average weight for his age is 50 percent more than his weight 50 percent of children his age weigh less than he does

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