2) A Pew Poll conducted in 2013 surveyed a random 1 conducted in 2013 surveyed a...
4) Is it possible that more than 25% of Americans believe they have seen a ghost? A Pew Poll conducted in 2013 surveyed a random sample of 2003 adult Americans, and 18% of them said that they had seen a ghost.
A Quinnipiac University poll conducted during the week of 2-2-2013 surveyed 1,230 registered voters nationwide and asked, "Do you support or oppose stricter gun laws in the United States?" 52% of respondents supported stricter gun laws. This poll had a margin of error of 3.3%. What is the confidence level that goes along with this poll (to 2 decimals)? The answer is not 98%, 98.98%, 99%, 99.01%
7) The Gallop Organization conducted a poll in April 2010 in which a simple random sample of 1020 The Gallop Americans age 18 or older were asked, "Do you consider the amount of federal income tax you have to pay is too high?" Of the 1020 adult Americans surveyed, 490 said yes. Construct as 90% confidence interval for the proportion of Americans age 18 or older who believe the amount of federal income tax they pay is too high.