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# Survey on Internet Awareness In a survey, 58% of American adults said they had never

ISBN: 9780073534978 253

## Solution for problem 25 Chapter 5-3

Elementary Statistics: A Step by Step Approach | 7th Edition

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Problem 25

Survey on Internet Awareness In a survey, 58% of American adults said they had never heard of the Internet. If 20 American adults are selected at random, find the probability that exactly 12 will say they have never heard of the Internet.

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Lecture 11/6/2017 CI for μ: (x-bar – E, x-bar + E) np ≥ s and nq ≥ 5 OR np^ ≥ 5 and nq^ ≥ 5 OR A court of at least 5 in each category. CI for pˆ= (pˆ – E, pˆ + E) where E = Z√((cˆ)(qˆ)/n) pˆ= x/n or y/n qˆ= 1 - pˆ Z = (pˆ– p)/(√((pˆ)(qˆ)/n)) n = (pˆ)(qˆ)(Z/Ec 2 OR n = ½ • ½ (Z/E)c= ¼((Z/E) c 2 → Lecture 11/8/2017 ← → Chapter 7: One...

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