Video: Identifying the Treatment and Response Variables in an Experiment

A solar panel manufacturer plans to carry out an experiment to investigate how two different transparent protective coatings deposited on solar panels affect their efficiency. Which of the following is the treatment variable in this experiment? [A] transparent protective coating [B] protective coating thickness [C] weather conditions [D] solar panel efficiency [E] sun exposure. Which of the following is the response variable in this experiment? [A] solar panel efficiency [B] protective coating thickness [C] weather conditions [D] transparent protective coating [E] sun exposure

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Video Transcript

A solar panel manufacturer plans to carry out an experiment to investigate how two different transparent protective coatings deposited on solar panels affect their efficiency. The first part of the question asks, which of the following is the treatment variable in this experiment? Choices are A) transparent protective coating, B) protective coating thickness, C) weather conditions, D) solar panel efficiency, and E) sun exposure. The second part of the question asks, which of the following is the response variable in this experiment? The options being A) solar panel efficiency, B) protective coating thickness, C) weather conditions, D) transparent protective coating, and E) sun exposure.

So if we look to answer the first part of the question first, in the first part, we’re asked to decide which is the treatment variable. But what is the treatment variable? Well, the treatment variable can also be known as the independent variable. And, therefore, it’s the variable whose variation does not depend on that of another. So what it means is it’s the variable that the experimenter or the investigator is going to be changing.

So if we take a look at our study or our experiment, we can see that the transparent protective coatings are going to be the independent variables because these do not vary with anything else changing them. They’re varied because the investigator changes them because there are two different types. And he wants to see how these will affect another variable. So therefore in answer to the question, which of the following is the treatment variable in this experiment, the correct answer is answer A, the transparent protective coating.

So now, we’re gonna move on to the second part of the question. In the second part, we’re asked, which of the following is the response variable in this experiment? So in order to answer this second part of the question, we need to know what the response variable is. Well, a response variable is another name for the dependent variable. So this means that this variable is dependent on something else. So it’s gonna be dependent on our independent variable. So we can say that when we change our independent variable, this variable will change as well.

Well, if we take a look at our scenario again, we can see that our independent variable was the transparent protective coatings. And we’re looking at two different types. But what we want to see is how these will affect the solar panel efficiency. So when we change the two different types of transparent protective coatings, will it affect the efficiency of the solar panels?

So, therefore, the solar panel efficiency is going to be our response variable or dependent variable. And this is because the efficiency of the solar panels will depend on the type of protective coating that’s been used. So therefore in answer to the question, which of the following is a response variable in this experiment, the correct answer is A, the solar panel efficiency.

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