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
2,365,*10^6=5,000,000*473
(P.S. 10^6 is 10 to the sixth power)
Answer:A -24 divided by 8 = -3
B -24/8 = -3
Step-by-step explanation:
I have worked out the answer to the question, I hope it helps you. Please do not forget to check if this answer if reliable, I am not always correct
L=1.5w. And the perimeter of a rectangle is 2w+2l=25 substitute the 1st equation into the second.2w+2(1.5w)=252w+3w=255w=25W=5
