Consulta en tu cuaderno diferentes porcentajes de IVA que se aplican a diferentes productos, cuando encuentres las diferentes tasas, da tres ejemplo por cada una de ella, ejemplo la TARIFA DEL IVA DEL 19 % Se aplica a la ropa, computadores, discos

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