Yes
Yes
No
No
We saw that if we want to have a probability of at least 95% that the poll results are within 1 percentage point of the truth, Chebyshev's inequality recommends a sample size of n=50,000 . This is very large compared to what is done in practice. Newspaper polls use smaller sample sizes for various reasons. For each of the following, decide whether it is a valid reason.
In the real world,
a) the accuracy requirements are looser.
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b) the Chebyshev bound is too conservative.
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c) the people sampled are all different, so their answers are not identically distributed.
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d) the people sampled do not have independent opinions.
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1 answer