A typical gallup poll surveys about n 1000 adults suppose


A typical Gallup poll surveys about n = 1000 adults. Suppose the sampling frame contains 100 million adults (including you). Now, select a random sample of 1000 adults.

(a) What is the probability that you will be in this sample?

(b) Now suppose that 2000 such samples are selected, each independent of the others. What is the probability that you will not be in any of the samples?

(c) How many samples must be selected for you to have a 0.5 probability of being in at least one sample?

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Basic Computer Science: A typical gallup poll surveys about n 1000 adults suppose
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