Quizzol

QUESTION:

Due to a limited budget, the researcher obtained opinions from a random sample of only 200 U.S. adults. With this sample size, the researcher can be 95% confident that the obtained sample proportion will differ from the true proportion (p) by no more than (answers are rounded):

7.1%

2.7%

ANSWER:

7.1%

Good job! Remember that for a sample size of n, the sample proportion $\hat{p}$ will differ from the “true” population proportion by no more than $\frac{1}{\sqrt{n}}$ . In this case, this is about 7.1%.

Posted by Cleveland on September 22, 2024