<span>It can also be known as the enhanced entity model. This model, used in the creation of databases, allows for more precise creation of classes and groups. This allows the user to put together databases that are more specialized and group the objects together in more complex manners.</span>
The superficial change in a system which itself stays invariant is termed <u>First-order</u> while the basic change in the structure of a system is called a <u>second-order</u>.
<h3>What is a
change?</h3>
This refers to any consistent trend in the environment that affects a substantial part of the globe.
However, the First-order is used when for the superficial change in a system and the Second-order is used for the basic change in the structure of a system.
Therefore, the "First-order" and "Second-order" are the respective answers.
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Answer: c) simplified description or representation of reality.
Explanation:
Model is defined as the representation of any object, person or real-world component through its structure, illustration, form and description. It helps in enhancing the understanding of the entity through the formation of replica of that entity.
Other options are incorrect because fact, statistic ,observation or any other measurement unit does not describe the model that is representing any real world entity. Thus, the correct option is option(c).
Answer:
Three factors that contribute to volunteer bias are: 1) privileges of the study participants and 2) having high energy and 3) being vested in the survey or research question.
Explanation:
Volunteer bias refers to the kind of bias that happens when volunteers are not likely to represent the general population. Volunteers may be more likely to be unemployed for example or they might be more likely to be women. It has been noted that project volunteers also tend to be high in agree-ableness and they are open to new experiences in terms of their personalities. This presents a problem when researchers want their same to be a general representation of the population. We should also consider the characteristics and lifestyles of those who decline from participating or who do not volunteer to really get a sense of the general population.
