A researcher's design of an experiment is to make clearer already known
facts, or to discover new knowledge.
The responses are:
- Experimental units: <u>The customers</u>
- Explanatory variable: The <u>type of checkout used</u>
- Treatments: The <u>checkout to which a customer is sent to</u>
- Response variable: The <u>time it takes to check out</u>
Reasons:
The aim of the experiment is to determine if self-check out is faster than
regular checkout.
The number of customers sent to one of the checkout options = 100
The experimental units are the subject of the experimental treatment.
Therefore;
- <u>The experimental units are the customers</u> that are sent to a particular checkout.
An explanatory variable is the manipulated variable in an experiment. An explanatory variable is known as an independent variable.
- In the question, <u>the explanatory variable are the type of checkout</u>; Self-checkout or regular checkout
Treatments are the levels of the explanatory variable available in the experiment, or a combination of the levels. The treatment is what the experimental units are subjected to.
- In the question, <u>the treatment are the use of self-checkout or regular checkout</u>.
The response variable, is also known as the dependent variable, that depends on the treatment an experimental unit is subjected to.
- <u>The response variable in the question is the times it takes to checkout</u>
Learn more about experimental design here:
brainly.com/question/2118275
Answer:
Step-by-step explanation:
|-10|>|2| is the same as 10>2 which is true. So the correct answer is B.
<span>I would say the answers are A and C.
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