English: Control group, the standard to which comparisons are made in an experiment. Many experiments are designed to include a control group and one or more experimental groups; in fact, some scholars reserve the term experiment for study designs that include a control group.
Espanol: Grupo de control, el estándar con el que se hacen las comparaciones en un experimento. Muchos experimentos están diseñados para incluir un grupo de control y uno o más grupos experimentales; de hecho, algunos académicos reservan el término experimento para diseños de estudio que incluyen un grupo de control.
Vicuña are native to the central Andes in South America, where found in Peru, northwestern Argentina, Bolivia, and northern Chile. A smaller, introduced population lives in central Ecuador.