experimental design\nlets check in\na(n) ______ refers to a substance or treatment that is often used in an…

experimental design\nlets check in\na(n) ______ refers to a substance or treatment that is often used in an experiment but does not have an actual medicinal or experimental benefit.\na extraneous variable\nb placebo\nc confounding variable\nd independent control\nplease select the best answer from the choices provided.\na\nb\nc\nd

experimental design\nlets check in\na(n) ______ refers to a substance or treatment that is often used in an experiment but does not have an actual medicinal or experimental benefit.\na extraneous variable\nb placebo\nc confounding variable\nd independent control\nplease select the best answer from the choices provided.\na\nb\nc\nd

Answer

Brief Explanations:

A placebo is a substance or treatment used in experiments that has no real medical or experimental benefit. It is often used to create a control - like effect to compare with the actual treatment group. An extraneous variable is an outside factor that can affect the outcome of an experiment. A confounding variable is related to both the independent and dependent variables and can distort results. Independent control is not the correct term for this concept.

Answer:

B. placebo