A recent study conducted by a health statistics center found that 2727% of households in a certain country had no landline service. This raises concerns about the accuracy of certain surveys, as they depend on random-digit dialing to households via landlines. Pick fivefive households from this country at random. Complete parts a) through c) below. Question content area bottom Part 1 a) What is the probability that all fivefive of them have a landline? enter your response here (Round to three decimal places as needed.) Part 2 b) What is the probability that at least one of them does not have a landline? enter your response here (Round to three decimal places as needed.) Part 3 c) What is the probability that at least one of them does have a landline? enter your response here (Round to three decimal places as needed.)
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27% of households have no landline, so the probability a randomly chosen household has a landline is p = 1 − 0.2727 = 0.7273. Show more…
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A recent study conducted by a health statistics center found that 27% of households in a certain country had no landline service. This raises concerns about the accuracy of certain surveys, as they depend on random-digit dialing to households via landlines. Pick three households from this country at random. Complete parts a) through c) below. a) What is the probability that all three of them have a landline? 0.389 (Round to three decimal places as needed.) b) What is the probability that at least one of them does not have a landline? 0.611 (Round to three decimal places as needed.) c) What is the probability that at least one of them does have a landline? (Round to three decimal places as needed.)
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