Which is an advantage of a market economy? A.
ability to control the cost of labor

B.
ability to limit consumer choices to practical goods

C.
ability to set high prices for all consumer goods

D.
ability to adjust to changes over time

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