A poll reported 44% support for a statewide election with a margin of error of 2.45 percentage points. How many voters should be sampled for a 95% confidence interval? Round up to the nearest whole number? ____voters

Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of 200 females are opposed to the death penalty. Group of answer choices a.(-0.200, -0.021) b.(-1.532, 1.342) c.(-1.324, 1.512) d.(-0.561, 0.651)

A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 3% margin of error at a 99% confidence level, what is the minimum sample size needed for the study?Give your answer as a whole number.

A political researcher takes a survey of 310 randomly selected registered voters in Orlando, and each person was asked who they plan on voting for in the 2024 presidential election. 110 said they plan on voting for Candidate A, 185 said they plan on voting for Candidate B, and 15 were unsure or plan to vote for another candidate. The researcher wants to construct a 95% confidence interval for the proportion of all registered voters in Orlando who plan to vote for Candidate B. What is the point estimate? Round final answer to 3 decimal places.

Which store do you think is more expensive—physical or online? A recent survey found that 45% of people aged 20 to 40 thought that physical stores were more expensive. To conduct a follow-up study that would provide 95% confidence that the point estimate is correct to within 0.05 of the population proportion, how many people aged 20 to 40 need to be sampled? (PHStat) To conduct a follow-up study that would provide 99% confidence that the point estimate is correct to within 0.05 of the population proportion, how many people aged 20 to 40 need to be sampled? (PHStat) Compare the results of (a) and (b).

Find the sample size needed to determine, with a margin of error of one percent, the percentage of Americans who think North Korea is the greatest foreign threat.  Use 90% confidence, and assume about 22% of Americans think that North Korea is the greatest threat.