document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=320759>Question 320759</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A political strategist claims that 55% of voters in Madison County support his candidate. In a poll of 200 randomly selected voters, 98 of them support the strategist's candidate.  At  = .05, is the political strategist's claim warranted? </SPAN>\n" );
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document.write( "Ho: p = 0.55 (claim)<BR>\n" );
document.write( "Ha: p not equal to 0.55<BR>\n" );
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document.write( "sample proportion = 98/200 = 0.49<BR>\n" );
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document.write( "z(0.49) = (0.49-0.55)/sqrt[0.55*0.45/200] = -1.7056<BR>\n" );
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document.write( "p-value = 2*P(z < -1.7056) = 2*normalcdf(-1000,-1.7056) = 0.0881<BR>\n" );
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document.write( "Since the p-value is greater than 5%, faill to reject Ho.<BR>\n" );
document.write( "The test results support the claim.<BR>\n" );
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document.write( "cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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