Most people can roll their tongues, but many cant. The ability to roll the tongue is genetically determined. Suppose we are interested in determining what proportion of students can roll their tongues. We test a simple random sample of 400 students and find that 317 can roll their tongues. The margin of error for a 95% confidence interval for the true proportion of tongue rollers among students is closest to

CONFIDENCE INTERVALS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Most people can roll their tongues, but many can’t. The ability to roll the tongue is genetically determined. Suppose we are interested in determining what proportion of students can roll their tongues. We test a simple random sample of 400 students and find that 317 can roll their tongues. The margin of error for a 95% confidence interval for the true proportion of tongue rollers among students is closest to

A	0.0008
B	0.02
C	0.003
D	0.04

Explanation:

Detailed explanation-1: -Tardive Dyskinesia is a movement disorder characterized by involuntary repetitive body movements, like chewing motions, cheek puffing, tongue protrusion and lip pursing. These symptoms appear during sleep and/or wakefulness. Report of involuntary movements of tongue is very rare, with a prevalence of only 15%–20%.

Detailed explanation-2: -According to a study published in the journal Dysphagia, 83.7% of the population could roll their tongue. Well, that’s impressive.

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RESEARCH METHODOLOGY

STATISTICAL TECHNIQUES AND TOOLS

CONFIDENCE INTERVALS