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:
2280 meters
Step-by-step explanation:
if i'm right plz mark me brainlest
Answer:
5
Step-by-step explanation:
If you are asking what x to the power of 2 minus x is as a mathematical expression, then your answer is:
= x^2 - x
If you are asking what another equivalent expression for x^2 - x is or if you want it in factorised form, then your answer is:
= x ( x - 1 )
Hope this was helpful! <3
They are adjacent because he share a vertex and a common side, and x=15° because 90°/(2+4)= 15
