Question

question 6 define confounding. choose the correct answer below. using treatments on many experimental units grouping together similar experimental units the effect of two factors (explanatory variables on the response variable) cannot be distinguished a controlled study to determine the effect varying one or more explanatory variables or factors has on a response variable

Explanation:

Confounding occurs when the effect of two factors (explanatory variables) on a response variable cannot be distinguished in a study. It is not about grouping similar experimental units or using treatments on units. A controlled study aims to determine the effect of varying explanatory variables but confounding is the issue when factors' effects are intertwined.

Answer:

The effect of two factors (explanatory variables) on the response variable cannot be distinguished