document.write( "Question 872510: 22. A medical researcher says that at least 27% of adults are smokers. In a random sample of 200 adults, 22.5% say they are smokers. At α = 0.03, do you have enough evidence to reject the researcher’s claim?
\n" ); document.write( "a. Write the claim mathematically and identify H0 and Ha.
\n" ); document.write( "b. Find the critical value(s) and identify the rejection region(s).
\n" ); document.write( "c. Find the standardized test statistic.
\n" ); document.write( "d. Decide whether to reject or fail to reject the null hypothesis.
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Algebra.Com's Answer #526194 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Ho: p >= 0.27
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document.write( "Ha: p < 0.27
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document.write( "z(.225) = -.045/ sqrt(.27*.73/200) = -.045/.0314 = -1.433
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document.write( "p-value = P(z < -1.433) =.0759
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document.write( "Fail to reject Ho (.0759 > .03) \n" );
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