Mathematics, 05.05.2020 17:40 44chandracloutier

Most people can roll their tongues, but many people can't. Whether or not a person can roll his tongue is genetically determined,
Suppose we are interested in determining what fraction of students can roll their tongues. We get a simple random sample of
400 students and find that 317 can roll their tongues. The standard error for a 95% confidence interval for the true proportion of
tongue-rollers among students is closest to

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Most people can roll their tongues, but many people can't. Whether or not a person can roll his tong...