The figures below refer to a herd of water buffalo.

birth rate = 35
death rate = 7
immigration = 4
emigration = 17

what is this population growth?
population increases by 41
population decreases by 15
population increases by 15
population decreases by 24

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