The Gallup organization conducted a poll of 2014 likely voters just prior to the 2004 presidential election. The results of the survey indicated that George W. Bush would receive 49% of the popular vote and John Kerry would receive 47% of the popular vote. The margin of error was reported to be 3%. The Gallup organization reported that the race was too close to call. Use the concept of a conﬁdence interval to explain what this means.
Answer to relevant QuestionsJane wants to estimate the proportion of students on her campus who eat cauli flower. After surveying 20 students, she ﬁnds 2 who eat cauliflower.Obtain and interpret a 95% conﬁdence interval for the proportion of ...Katrina wants to estimate the proportion of adultAmericans who read at least 10 books last year. To do so, she obtains a simple random sample of 100 adult Americans and constructs a 95% conﬁdence interval. Matthew also ...A simple random sample of sizen is drawn from a population that is normally distributed. The sample mean, x, is found to be 108, and the sample standard deviation,s, is found to be 10. (a) Construct a 96% conﬁdence ...A Gallup poll conducted July 21–August 14, 1978, asked 1006 Americans, “During the past year, about how many books, either hardcover or paperback, did you read either all or part of the way through? ”Results of the ...Treat the data obtained in the Sullivan Statistics Survey as a simple random sample of adult Americans.One question asked in the survey was“In your opinion, what minimum annual income for an individual qualiﬁes an ...
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