Questions: Any combination of the values of the factors (explanatory variables) Treatment A quantitative or qualitative variable that represents the variable of interest The variable whose effect on the response variable is to be assessed by the experimenter distinguished. Confounding Nondisclosure of the treatment an experimental unit is receiving

The question appears to be related to experimental design and statistical terminology. Let's address each part of the question based on the provided text.

1. Any combination of the values of the factors (explanatory variables): This is typically referred to as a treatment in the context of an experiment. Treatments are the different conditions or interventions applied to experimental units.

2. A quantitative or qualitative variable that represents the variable of interest: This is known as the response variable. The response variable is what the experimenter measures to determine the effect of the treatments.

3. The variable whose effect on the response variable is to be assessed by the experimenter: This is the explanatory variable (also known as the independent variable). The explanatory variable is manipulated to observe its effect on the response variable.

4. Confounding: Confounding occurs when the effect of the explanatory variable on the response variable is mixed up with the effect of another variable. This makes it difficult to determine the true relationship between the explanatory and response variables.

5. Nondisclosure of the treatment an experimental unit is receiving: This is referred to as blinding. Blinding is used to prevent bias in experiments by ensuring that participants and/or researchers do not know which treatment the experimental units are receiving.

To summarize:

• The combination of values of the factors is called a treatment.
• The variable of interest is the response variable.
• The variable whose effect is being assessed is the explanatory variable.
• Confounding is when the effect of the explanatory variable is mixed with another variable.
• Blinding is the nondisclosure of the treatment an experimental unit is receiving.