document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1002333>Question 1002333</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Past surveys reveal that 30% of tourists going to Las Vegas to gamble spend more than $1,000. The Visitor’s Bureau of Las Vegas wants to update this percentage.<BR>\n" );
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document.write( "a.	<BR>\n" );
document.write( "The new study is to use the 90% confidence level. The estimate is to be within 1% of the population proportion. What is the necessary sample size </SPAN>\n" );
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document.write( "a.	<BR>\n" );
document.write( "The new study is to use the 90% confidence level. The estimate is to be within 1% of the population proportion. What is the necessary sample size <BR>\n" );
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document.write( "Since E(x) = z*sqrt(pq/n),<BR>\n" );
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document.write( "n = [z/E]^2*p*q<BR>\n" );
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document.write( "n = [1.645/0.01]^2*0.3*0.7<BR>\n" );
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document.write( "n = [164.5]^2*0.3*0.7<BR>\n" );
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document.write( "n = 5683 when rounded up<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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