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Sample Size and Confidence Intervals in Statistical Analysis

If a random sample of 10 people found that 9 were pro-life (i.e., 90%), while another random sample
of 1000 people from the same population found that 550 were pro-life (i.e. 55%), which would you find to be more significant? Why?

When pollsters report results of a poll, they often include the margin of error but not much more.
If candidate X has 54% support of the voters with a margin of error of 3%,that means the candidate is predicted to have between 51% and 57% support in the election. Before jumping to conclusions, what other information would
you like the pollster to provide?

Solution Preview

Thanks for letting me work on your question. Here is my explanation:

Q1: to be more significant, the sample size needs to be ...

Solution Summary

The solution provides a detailed explanation as to how to find margin of error and compare significance level.