A cable provider wants to contact customers in a particular telephone exchange t
ID: 3225766 • 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. What distribution would they use to model the selection. The new business "incubator'' was assigned the 600 numbers between 452.2000 and 452.2599, 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? Numbers above 5000 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(n) Uniform distribution should be used to model the selection. The probability that the randomly selected number will be for an incubator business is ________. (Round to two decimal places as needed.) Shortly after the introduction of a new coin newspapers published asides claiming the coin is biased. The stories were based on reports that someone had spun the coin 150 times and gotten 87 heads-that's 58% heads.Explanation / Answer
Given,
a total of 10000 numbers ranging from 452-0000 to 452-9999 are considered
A.a) Uniform Distribution
A.b) Incubator has 600 numbers
P(E)=600/10000=0.06 or 6%
Probability that randomly selected number is from incubator is 0.06 or 6%
A.c) Domestic use has assigned 5000 numbers
P(E)=5000/10000=0.5 or 50%
Probability that number selected is from domestic use is 0.5 or 50%
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