A political scientist needs to poll all voters in Seoul, South Korea, in order to predict the outcome of an election. Because it would be impossible to collect data from every single person in the city, the political scientist polls a part of the population that is representative of the whole. What does this scenario describe? 1 分Choosing a data typeChoosing quantitative dataUsing a sampleUsing a population

A data analyst at an energy utility wants to study the opinions of all adults in Portugal about green energy. Because It would be impractical to collect data from every single person in the country, the data analyst studies a part of the population that is representative of the whole. What does this scenario describe? 1 分Choosing quantitative dataUsing a sampleUsing a populationChoosing a data type

In the context of election polling in the Philippines, what is a "sample"? The entire population of voters in the country. The group of voters who favor various candidates. The percentage of voters who participate in the election. A few hundred or a few thousand voters selected for an opinion poll.

A political candidate surveys voters to learn about their opinions on key issues. The politician’s data team notices that most respondents are people who have already voted in the current election. The fairness of the survey could be improved by over-sampling people from which group?1 pointPeople who have not yet voted in the electionPeople who voted against the candidate in the current electionFirst-time voters who already voted in the current electionPeople who voted for the candidate in the current election

A politician is interested in the proportion of voters in his district who think he is doing a good job. Define the following in terms of the study. Give examples where appropriate.Part (a)The populationThe population is all voters in the district.The population is all the voters in the district who think the politician is doing a good job.    The population is a group of voters in the district.The population is a group of voters in the district who think the politician is doing a good job.Part (b)The sampleThe sample is all the voters in the district who think the politician is doing a good job.The sample is all voters in the district.    The sample is a group of voters in the district who think the politician is doing a good job.The sample is a group of voters in the district.Part (c)The parameterThe parameter is the number of people in the district.The parameter is the proportion of all voters in the district who think the politician is doing a good job.    The parameter is the proportion of a group of voters in the district who think the politician is doing a good job.The parameter is the number of registered voters in the district.Part (d)The statisticThe statistic is the number of registered voters in a group of people.The statistic is the number of people in the district.    The statistic is the proportion of a group of voters in the district who think the politician is doing a good job.The statistic is the number of voters in the district who think the politician is doing a good job.

Every four years, when it is time to elect a new president, we pay much attention to surveys, which we usually call “polls.” Political pollsters typically ask approximately one thousand people, of the 300 million people in the United States, who they plan to vote for. They use that information to predict how the election will turn out. Who is the sample for a presidential poll?Group of answer choicesevery person who is planning on votingevery Americanpeople who have strong political opinionsthe 1,000 people asked whom they will vote for