"Tongue Piercing May Speed Tooth Loss, Researchers Say" is the headline of an article. The article describes a study of 49 young adults with pierced tongues. The researchers found receding gums, which...

"Tongue Piercing May Speed Tooth Loss, Researchers Say" is the headline of an article. The article describes a study of 49 young adults with pierced tongues. The researchers found receding gums, which can lead to tooth loss, in 18 of the participants.

(a) Construct a 95% confidence interval for the proportion of young adults with pierced tongues who have receding gums. (Round your answers to three decimal places.)
( , )

(b) What assumptions must be made for use of thez confidence interval to be appropriate? (Select all that apply.)

The sample is a random sample.

The sample is independent.

The sample size is large.

The sample is voluntary.

Jun 10, 2022

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"Tongue Piercing May Speed Tooth Loss, Researchers Say" is the headline of an article. The article describes a study of 49 young adults with pierced tongues. The researchers found receding gums, which...

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