_______________occurs when two or more input factors are expected to affect the output factor but are found to be highly correlated. 1 point Multi-collinearity Blocking Confounding Nesting 2. Question 2 In DOE we are ___________ independent variables and observing the effects on the dependent variable 1 point Measuring Actively manipulating Determining Passively observing 3. Question 3 An _____________ is an independent variable which may affect a response variable 1 point input factor main effects Treatments Degrees of freedom 4. Question 4 __________is important in DOE because our estimate for each main effect and interaction effect can be made independently of other variables. 1 point Orthogonality Nesting Mixing Sequencing 5. Question 5 __________ is used to account for variables that the experimenter wishes to avoid and reduce unexplained variability. 1 point Blocking Mixing Confounding Nesting