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One article describes a study of 81 randomly selected young adults with pierced tongues. The researchers...

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Statistics

One article describes a study of 81 randomly selected youngadults with pierced tongues. The researchers found receding gums,which can lead to tooth loss, in 25 of the participants.

(a) Construct a 95% confidence interval for the proportion ofyoung adults with pierced tongues who have receding gums. (Don’tforget to check all conditions necessary to your construction!)

(b) Write a sentence in which you correctly interpret theconfidence interval you created.

(c) Would the interval you found in (a) have been wider,narrower, or the same width if only 60 young adults had beensampled?

Answer & Explanation Solved by verified expert
3.7 Ratings (410 Votes)
aSample proportion 25 81 030995 confidence interval for p is Z2 sqrt 1 n p Z2 sqrt 1 n    See Answer
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