an independent variable is\na. directly changed by the experimenter.\nb. manipulated by changes to the…

an independent variable is\na. directly changed by the experimenter.\nb. manipulated by changes to the dependent variable.\nc. a variable that is kept constant.\nd. a variable that is used as a control.\nplease select the best answer from the choices provided\no a\no b\no c\no d

an independent variable is\na. directly changed by the experimenter.\nb. manipulated by changes to the dependent variable.\nc. a variable that is kept constant.\nd. a variable that is used as a control.\nplease select the best answer from the choices provided\no a\no b\no c\no d

Answer

Answer:

A. directly changed by the experimenter

Brief Explanations:

In an experiment, the independent variable is what the experimenter manipulates or changes directly to observe its effect on the dependent variable. Options B - D are incorrect definitions.