Aresearcher introduces a new mathematics program in one school district and uses a neighboring district as a no-treatment control group. before the program begins, the students in both districts are given a standardized mathematics test. after the program is in place for six months, the students are tested again and the researcher compares the before and after scores for the two groups. this research study is classified as

Horton automatics and the industrial division of the communications workers of america, the union that represented horton’s workers, negotiated a collective bargaining agreement. if an employee’s discharge for a workplace-rule violation was submitted to arbitration, the agreement limited the arbitrator to determining whether the rule was reasonable and whether the employee had violated it. when horton discharged employee ruben de la garza, the union appealed to arbitration. the arbitrator found that de la garza had violated a reasonable safety rule, but “was not totally convinced” that horton should have treated the violation more seriously than other rule violations. the arbitrator ordered de la garza reinstated. can a court set aside this order