Suppose that a poll is being conducted in the village of Lemont. The pollster identifies her target population as all residents of Lemont 18 years old or older. This population has 6494 people.
(a) Compute the probability that the first resident selected to participate in the poll is Roger Cummings and the second is Rick Whittingham.
(b) The probability that any particular resident of Lemont is the first person picked is 1/6494. Compute the probability that Roger is selected first and Rick is selected second,
assuming independence. Compare your results to part (a).
Conclude that, when small samples are taken from large populations without replacement, the assumption of independence does not significantly affect the probability.

  • CreatedApril 27, 2015
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