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Exit polling is a popular technique used to determine the outcome of an election prior to results being tallied. Suppose a referendum to increase funding for education is on a ballot in a large town (voting population over 100,000). An exit poll of 300 voters finds that 144 voted for the referendum.

How likely are the results of your sample if the population proportion of voters in the town in favor of the referendums is 0.52?

The probability that less than 144 people voted for the referendum is___________ (round to four decimal places)

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3 answers
  1. Population has binomial distribution.
    sample mean is 144/300.

    Check that sample satisfies normal approximation and proceed as in your next post.
    Do not forget to apply continuity correction when approximating a discrete distribution (such as binomial) by a continuous distribution (such as normal).

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  2. Thanks I have the answer now

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  3. he use of these can enhance meaning by providing a type of punctuation, emphasizing a point, or drawing attention to a key thought

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