A political pollster is conducting an analysis of sample results in order to make predictions on election night.Assuming a two-candidate election,if a specific candidate receives at least 54%of the vote in the sample,that candidate will be forecast as the winner of the election.You select a random sample of 100 voters. Suppose that the sample size was increased to 400.Repeat process(a)through(c),using this new sample size.Comment on the difference. The probability isthat a candidate will be forecast as the winner when the popuio percentage of her vote is50.1%. Choose the correct answer below. A. Increasing the sample size by a factor of 4 increases the standard error by a factor of 2. Changing the standard error doubles the magnitude of the standardized​ Z-value. B. Increasing the sample size by a factor of 4 decreases the standard error by a factor of 2. Changing the standard error doubles the magnitude of the standardized​ Z-value. C. Increasing the sample size by a factor of 4 increases the standard error by a factor of 2. Changing the standard error decreases the standardized​ Z-value to half of its original value. D. Increasing the sample size by a factor of 4 decreases the standard error by a factor of 2. Changing the standard error decreases the standardized​ Z-value to half of its original value.

A political pollster is conducting an analysis of sample results in order to make predictions on election night. Assuming a​ two-candidate election, if a specific candidate receives at least ​% of the vote in the​ sample, that candidate will be forecast as the winner of the election. You select a random sample of voters. Complete parts​ (a) through​ (c) below. Question content area bottom Part 1 a. What is the probability that a candidate will be forecast as the winner when the population percentage of her vote is ​%? The probability is    0.2177 that a candidate will be forecast as the winner when the population percentage of her vote is ​%. ​(Round to four decimal places as​ needed.) Part 2 b. What is the probability that a candidate will be forecast as the winner when the population percentage of her vote is ​%? The probability is    enter your response here that a candidate will be forecast as the winner when the population percentage of her vote is ​%. ​(Round to four decimal places as​ needed.)

A political polling agency wants to take a random sample of registered voters and ask whether or not they will vote for a certain candidate. One plan is to select 400 voters, another plan is to select 1,600 voters.If the study were conducted repeatedly (selecting different samples of people each time), which one of the following would be true regarding the resulting sample proportions of "yes" responses? Different sample proportions would result each time, but for sample size 400 they would be centered (have their mean) at the true population proportion, whereas for sample size 1,600 they would not. Different sample proportions would result each time, but for either sample size, they would be centered (have their mean) at the true population proportion. Different sample proportions would result each time, but for sample size 1,600 they would be centered (have their mean) at the true population proportion, whereas for sample size 400 they would not. For either sample size, using the same size each time, as long as the samples are drawn with replacement, they would be centered (have a mean) at 0.

A political polling agency wants to take a random sample of registered voters and ask whether or not they will vote for a certain candidate. One plan is to select 400 voters, another plan is select 1,600 voters.Which of the following is true regarding the sample proportion p̂ of "yes" responses?Group of answer choicesThe sample proportion in either proposal is equally likely to be close to the true population proportion, p, since the sampling is random.The sample proportion from sample of 1,600 is more likely to be close to the true population proportion, p.The sample proportion from the sample of 400 is more likely to be close to the true population proportion, p.

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

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