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May 6th, 2018, 04:22 PM   #1
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Question statistics homework help please

A television news story claimed that half of all U.S. adults have health issues. In a national poll about health issues (CDC Project), 12,638 U.S. adults were surveyed and it was found that 6413 of those surveyed had health issues. At a 5% level of significance, perform a hypothesis test to test the claim made by the television news story.

What is the correct conclusion?

I get a Z Score of 0 not sure where to proceed from there
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May 9th, 2018, 12:45 PM   #2
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You have not specified whether this is a one-tail or two-tail test. For a one-tail test you should get $\displaystyle p=0.047$. The two-tail test is double that.

Are you sure you have the right formula?

$\displaystyle z=\dfrac{\widehat{p}-p}{\sqrt{\dfrac{pq}{n}}}$
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