document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=387159>Question 387159</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Qustion: A survey of 950 car owners found that 28% of the cars are named Lexus. Find the 99% confidence interval of the true proportion of cars named Lexus.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #273665 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=273665\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  A survey of 950 car owners found that 28% of the cars are named Lexus. Find the 99% confidence interval of the true proportion of cars named Lexus. <BR>\n" );
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document.write( "p-hat = 0.28<BR>\n" );
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document.write( "ME = z*sqrt[pq/n]<BR>\n" );
document.write( "= 2.5758*sqrt[0.28*0.72/950]<BR>\n" );
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document.write( "= 0.0375<BR>\n" );
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document.write( "99% CI: 0.28-0.0375 < p < 0.28+0.0375<BR>\n" );
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document.write( "99% CI: 0.2425 < p < 0.3175<BR>\n" );
document.write( "==============================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
document.write( " </SPAN>\n" );
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