Johnson: Attempt 1 Question 1 (7 points) The report of a sample survey of 1014 a

Question

Johnson: Attempt 1 Question 1 (7 points) The report of a sample survey of 1014 adults says, "with 95% confidence, between 9% and 15% of all Americans expect to spend more on gifts this year than lst year." What does the phrase-95% confidence" mean? 9% to 15% of all Americans will spend 95% of what they spent last year. O There isa 95% chance thatthe percent who expect to spend more is between 9% and 15%. The method used to get the interval 9% to 15%, when used over and over again, produces population proportion 95% of the time. erals which include the true 95% of all Americans will spend between 9% and 15% more than what they spent last year.

Explanation / Answer

This is a case of a confidence interval, the 95% confidence interval for the proportion is given to be from 9% to 15%, therefore this means that there is a 0.95 probability that between 9% and 15% of all Americans spends more on gifts this year than last year.

Therefore b) is the correct answer here.

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