<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.
The correct answer for this question is "E.)decent computer." A report states that 77% of the parents of high school students in North Dakota's public schools think that all students should be provided with a decent <span>computer. The term 'decent computer' must be defined properly.</span>
Answer:
False
Explanation:
The first settlers of Vanuatu and Tonga arrived from northern Philippines and Taiwan between 2,300 and 3,100 years ago. DNA extracted from the skeletons found at two archaeological sites on the islands confirm this. It also suggests that the first settlers ma have by passed Papua New Guinea and Australia.
The reason behind their migration is still unknown. Some anthropologists argues that the people from islands of Asia mixed with the people of Papua New guinea, Australia and Solomon Islands while other claim that they went straight to islands such as Tonga.
Researches have also found that the people who colonised Tonga belonged to Lapita ancestry and shared a common ancestry with the present day people of Taiwan.
I believe the answer would be A, they came from Spain and Portugal.
Explain please... 700 what?
