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According to the National Center for Health Statistics (2004), 22.4% of adults are smokers. A random sample of 300 adults

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According to the National Center for Health Statistics (2004), 22.4% of adults are smokers. A random sample of 300 adults is obtained.

(a) Describe the sampling distribution of , the sample proportion of adults who smoke.

(b) In a random sample of 300 adults, what is the probability that at least 50 are smokers?
(c) Would it be unusual if a random sample of 300 adults results in 18% or less being smokers?

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a Our sample size n 300 is less than 5 of the populati…View the full answer


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Fundamentals Of Statistics

Fundamentals Of Statistics

ISBN: 9780321844606

4th Edition

Authors: Michael Sullivan III

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