Question

You want know if self-checkout is faster than regular checkout. One hundred customers were sent to

Answer 1

A researcher's design of an experiment is to make clearer already known

facts, or to discover new knowledge.

The responses are:

• Experimental units: The customers

• Explanatory variable: The type of checkout used

• Treatments: The checkout to which a customer is sent to

• Response variable: The time it takes to check out

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;

• The experimental units are the customers 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, the explanatory variable are the type of checkout; 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, the treatment are the use of self-checkout or regular checkout.

The response variable, is also known as the dependent variable, that depends on the treatment an experimental unit is subjected to.

• The response variable in the question is the times it takes to checkout

Learn more about experimental design here:

brainly.com/question/2118275