Answer:A. Comparative advantage
Explanation:Comparative advantage refers to an advantage that a country has because they can produce goods or services in a much cheaper way than just countries. It what determines a trade off. A state which holds a comparative advantage will improve the trade off value. When one buys goods from that state they will benefits more than losing . It will cost less to import goods
Answer:
a) questionnaires
b) attitudes of student who had and who hadn't taken the course
c) difference in age group of students among whom questionnaire were distributed in both the groups.
d) restrict the age group in both the experimental groups.
Explanation:
The complete quetion is:
An investigator was interested in studying the effect of taking a course in child development upon attitudes toward childrearing. At the end of the semester, the researcher distributed a questionnaire to students who had taken the child development course. Questionnaires were also given to an equal number of students who had not taken the course. The students who had taken the child development course had different attitudes from the students who had not taken the course (cg., they had more positive response about having large families).
a) Identify the independent variable
b) Identify the dependent variable
c) identify confounding variable
d) propose a method to unconfound the experiment
a) questionnaires
b) attitudes of student who had and who hadn't taken the course
c) difference in age group of students among whom questionnaire were distributed in both the groups can lead to different understanding of questionnnaire and so affect the response towards the questions.
d) restrict the age group in both the experimental groups.
Confounding variables are variables that effect both the dependent and independent variable
<u>Answer:</u>
Give yourself a four second or me more cushion of space in front of your vehicle when following large vehicles that block your view of the road ahead.
<u>Explanation:</u>
- In order to ensure safety from the vehicles coming from the other side of the road when the road in front of you is blocked by an object bigger than your vehicle, it is advised that a space of at least four seconds is left between your vehicle and the vehicle ahead of you (both moving at an almost constant speed).
- This cushion of space between your vehicle and the other vehicle provides for space for safe skidding in case of emergency braking if required.
