document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=578567>Question 578567</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A survey conducted by USA today showed that 118 of 250 investors owned some real estate.  In the past it showed that 45% of investors owned some real estate.  Has the number of investors that own some real estate increased?  Use alpha =.01 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #370690 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=370690\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A survey conducted by USA today showed that 118 of 250 investors owned some real estate. In the past it showed that 45% of investors owned some real estate. Has the number of investors that own some real estate increased? Use alpha =.01<BR>\n" );
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document.write( "Ho: p <= 0.45<BR>\n" );
document.write( "Ha: p > 0.45 (claim)<BR>\n" );
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document.write( "sample proportion = 118/250 = 0.4720<BR>\n" );
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document.write( "p(0.4720) = (0.4720-0.45)/sqrt[0.45*0.55/250] = 0.6356<BR>\n" );
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document.write( "p-value = P(z > 0.6356) = normalcdf(0.6356,100) = 0.2625<BR>\n" );
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document.write( "Since the p-value is greater than 5%, fail to reject Ho.<BR>\n" );
document.write( "The test results do not support the claim.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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