A poll is taken in which 300 out of 575 randomly selected voters indicated their preference for a certain candidate. (a) Find a 90% confidence interval for p.  ≤ p ≤  (b) Find the margin of error for this 9090% confidence interval for pp. (c) Without doing any calculations, indicate whether the margin of error is larger or smaller or the same for an 80% confidence interval. A. smaller B. larger C. same

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Q: A poll is taken in which 398 out of 550 randomly selected voters indicated their preference for a…

A: p^ = 398550p^ =0.724

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.