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1. A telephone survey uses a random digit dialing machine to call subjects. The random digit dialing machine is expected to reach a live person 15% of the time. a. True or False: Each call is an independent random event.

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1.      A telephone survey uses a random digit dialing machine to call subjects. The random digit dialing machine is expected to reach a live person 15% of the time.

a.      True or False: Each call is an independent random event.

In two attempts, what is the probability of achieving……

b.      exactly two successful calls? (success = reach a live person)

c.      one success and one failure (in any order)?

 
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