Recent information suggests th

Recent information suggests that obesity is an increasing problem in America among all age groups. The Associated Press (October 9, 2002) reported that 1276 individuals in a sample of 4115 adults were found to be obese (a body mass index exceeding 30; this index is a measure of weight relative to height).

a. Estimate the proportion of all American adults who are obese in a way that conveys information about the reliability and precision of the estimate.

b. A 1998 survey based on people’s own assessments revealed that 20% of all adult Americans consider themselves obese. Does the estimate of part (a) suggest that the 2002 percentage is more than 1.5 times the 1998 percentage? Explain.

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