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Statistics

When an opinion poll calls residential telephone numbers at random, only 20% of the calls reach a live person. You watch the random digit dialing machine make 15 calls.

a) What is the probability that exactly 3 calls reach a person?

b) What is the probability that at most 3 calls reach a person?

c) What is the mean number of calls that reach a person?

d) What is the standard deviation of the count of calls that reach a person?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91118004

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