<u>Answer:
</u>
The study carried out by Dr. Xu is a randomized controlled study.
<u>Explanation:</u>
- For the sake of determination of how the results of the students change by doing certain changes to the examination pattern, Dr. Xu devised that the change is considerably evident.
- Dr. Xu provided and intervention in the process of exam in the form of guides which helped the students to score better later. Hence, from the standard of conduct of the study, it can be said to be a randomized controlled study.
Below are some traffic safety and streets issues facing communities: ... road accident - 40% of the road accident is caused by street lighting. it should be improved into more visible from drivers. increase the number of road humps, this is for drivers who falls asleep while driving.
The economic term is the opportunity cost.
The concept of opportunity cost is a relatively inexpensive and relative measure that involves people's preferences, so it varies from person to person. It is a question of comparing what is left over when making a decision.
In Katie's case, the opportunity cost of the money she saves to buy a car is what she fails to do with that money. For example, she stops investing in stocks, fails to make a trip, etc.
All decisions involve an opportunity cost. Taking another example, the opportunity cost of studying for the test at the end of the week is measured by the loss of leisure you would have. However, the decision to study for the test is chosen because it is more valuable.
The answer to this question is <span>Nature contributes substantially to the monkeys' preference for visual novelty.
It's very important for monkey to utilize thier visual novelty in order to gather enough foods and avoid predators in the jungle. Humans needs no such things because we just use our visual capability to navigate without having to worry about foods or predators.</span>
<span>Computer abuse involves the commission of acts involving the computer that may not be illegal but are considered unethical.
A..true</span>
