<u>Question 1</u>
The correct answer is: "The researchers administered a questionnaire to obtain their data without trying to influence an explanatory variable of the study".
An observational study is one in which the researcher observes the effect of a variable without manipulating the conditions that surround the exposure or the subjects who are exposed to it. In this example, he simply hands out questionaires to the 353 individuals that compose the sample drawn from the population of interest: 12-year old teenagers.
<u>Question 2</u>
The correct answer is: "a cohort study".
The researcher is interested on a population group where all the components share a common characteristic (12-year old) and therefore they all belong to the same cohort. Subsequenly, he evaluates the differences between the ones who have been exposed to the explanatory variable (having a video console in the bedroom) and those who have not.
C. A very cold day
Hope that helps !
Answer:
Because we have mind to do social things. We developed according to our social environment.
Because we have mind to do social things. We developed according to our social environment.If you see history all the civilizations are developed socially it means a man is born to be social. We learn from others. Even animals are social to lI've life safer the rules are equally applicable to them.
The problem starts already earlier:wildlife experts can only estimate the number of species in the world generally!
This is the case because there are simply too many species, and it takes time to documents them; because some areas (ocean bottom for example) are very hard to access and because sometimes it's hard to know whether we're talking about a new species or a variation within the same species.
so if we even don't know how many species there are, it's even harder to know how many are endangered.
Answer:
No they are not
Explanation:
No they are not because they don't have conscience. That's why we differ from animals.
For example: A monkey might steal your banana and run away. A monkey has a brain but doesn't think as a human because of lack of conscience.
Hope it really helps.
