A cable provider wants to contact customers in a particular telephone exchange t
ID: 3231394 • Letter: A
Question
A cable provider wants to contact customers in a particular telephone exchange to see how satisfied they are with the new digital TV service the company has provided All numbers are in the 452 exchange so there are 10,000 possible numbers from 452-0000 to 452-9999 Assume they select the numbers with equal probability. a) What distribution would they use to model the selection b) The new business "incubator was assigned the 500 numbers between 452-2000 and 452-2499 but these new businesses don't subscribe to digital TV What is the probability that the randomly selected number will be for an incubator business? c) Numbers above 6000 were only released for domestic use last year so they went to newly constructed residences What is the probability that a randomly selected number will be one of these? a) A (n) Uniform distribution should be used to model the selection. b) The probability that the randomly selected number will be for an incubator business is. (Round to two decimal places as needed.) c) The probability that a randomly selected number will belong to a newly constructed residence is. (Round to two decimal places as needed.)Explanation / Answer
(a) Uniform distribution
(b) The probability that randomly selected number is of an incubator business = 500/10000 = 0.05
(c) Numbers above 6000 are 4000. So, the probability that randomly selected number is these numbers = 4000/10000 = 0.4
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