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) Find the standard error. b) Find an approximate 90% confidence interval for the percentage of all Americans who believe they have seen a ghost. c) Is it plausible to conclude that 25% or more 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) Find the standard error. b) Find an approximate 90% confidence interval for the percentage of all Americans who believe they have seen a ghost. c) Is it plausible to conclude that 25% or more Americans believe they have seen a ghost?
Chapter9: Sequences, Probability And Counting Theory
Section9.7: Probability
Problem 1SE: What term is used to express the likelihood of an event occurring? Are there restrictions on its...
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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) Find the standard error.
b) Find an approximate 90% confidence interval for the percentage of all Americans who believe they have seen a ghost.
c) Is it plausible to conclude that 25% or more Americans believe they have seen a ghost?
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