Now, suppose you increase your sample to 700 voters, but only 54% of the sample say they will vote for Biden. What is your new 95% confidence interval for p?

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.