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Between January and June of 2015, the Gallup Poll conducted telephone interviews. The interviews were part of the Gallup-Healthways Well-Being Index...

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Between January and June of 2015, the Gallup Poll conducted telephone interviews. The interviews
were part of the Gallup-Healthways Well-Being Index survey. The researchers interviewed a randon
sample of adults, aged 18 and older. The adults lived throughout the 50 US. states and the District 0:
Columbia. The researchers asked these people if they exercise for 30 minutes a day, three or more
times each week. Among the men (sam le 1), 49.3% answered ”Yes” whereas 51.1% of the women
(sample 2) answered “Yes”. The resear ers estimated that the 96% confidence interval for the true
difference between the proportions of all U.S adult men and women who would answer “Yes” to the
question was between -0.052 and -0.024. Assume all checks have been verified. 1. Choose the best answer below concerning a confidence interval for the difference between the
corresponding true proportions of men and women who exercise for 30 minutes a day, three or more
limes each week. a)x=z[fl b) an Pug?)
n
Gal—£2)” in? (0051—1) 1 2 e) None of the above formulas are appropriate.

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